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Engineers invent a process to 'dope' carbon filaments with an additive to improve their electronic performance, paving the way for digital devices that bend.
Engineers would love to create flexible electronic devices, such as e-readers that could be folded to fit into a pocket. One approach they are trying involves designing circuits based on electronic fibers, known as carbon nanotubes (CNTs), instead of rigid silicon chips.
But reliability is essential. Most silicon chips are based on a type of circuit design that allows them to function flawlessly even when the device experiences power fluctuations. However, it is much more challenging to do so with CNT circuits.
Now a team at Stanford has developed a process to create flexible chips that can tolerate power fluctuations in much the same way as silicon circuitry.
"This is the first time anyone has designed a flexible CNT circuits that have both high immunity to electrical noise and low power consumption, " said Zhenan Bao, a professor of chemical engineering at Stanford with a courtesy appointment in Chemistry and Materials Science and Engineering.
The group reported its findings in the Proceedings of the National Academy of Sciences. Huiliang (Evan) Wang, a graduate student in Bao's lab, and Peng Wei, a previous postdoc in Bao's lab, were the lead authors of the paper. Bao's team also included Yi Cui, an associate professor of materials science at Stanford, and Hye Ryoung Lee, a graduate student in his lab.
In principle, CNTs should be ideal for making flexible electronic circuitry. These ultra thin carbon filaments have the physical strength to take the wear and tear of bending, and the electrical conductivity to perform any electronic task.
But until this recent work from the Stanford team, flexible CNTs circuits didn't have the reliability and power-efficiency of rigid silicon chips.
Here's the reason. Over time, engineers have discovered that electricity can travel through semiconductors in two different ways. It can jump from positive hole to positive hole, or it can push through a bunch of negative electronic like a beaded necklace. The first type of semiconductor is called a P-type, the second is called and N-type.
Most importantly, engineers discovered that circuits based on a combination of P-type and N-type transistors perform reliably even when power fluctuations occur, and they also consume much less power. This type of circuit with both P-type and N-type transistors is called complementary circuit. Over the last 50 years engineers have become adept at creating this ideal blend of conductive pathways by changing the atomic structure of silicon through the addition of minute amounts of useful substances – a process called "doping" that is conceptually akin to what our ancestors did thousands of years ago when they stirred tin into molten copper to create bronze.
The challenge facing the Stanford team was that CNTs are predominately P-type semiconductors and there was no easy way to dope these carbon filaments to add N-type characteristics.
The PNAS paper explains how the Stanford engineers overcame this challenge. They treated CNTs with a chemical dopant they developed known as DMBI, and they used an inkjet printer to deposit this substance in precise locations on the circuit.
This marked the first time any flexible CNT circuit has been doped to create a P-N blend that can operate reliably despite power fluctuations and with low power consumption.
The Stanford process also has some potential application to rigid CNTs. Although other engineers have previously doped rigid CNTs to create this immunity to electrical noise, the precise and finely tuned Stanford process out performs these prior efforts, suggesting that it could be useful for both flexible and rigid CNT circuitry.
Bao has focused her research on flexible CNTs, which compete with other experimental materials, such as specially formulated plastics, to become the foundation for bendable electronics, just as silicon has been the basis for rigid electronics.
As a relatively new material, CNTs are playing catch up to plastics, which are closer to mass market use for such things as bendable display screens. The Stanford doping process moves flexible CNTs closer toward commercialization because it shows how to create the P-N blend, and the resultant improvements in reliability and power consumption, already present in plastic circuits.
Although much work lies ahead to make CNTs commercial, Bao believes these carbon filaments are the future of flexible electronics, because they are strong enough to bend and stretch, while also being capable of delivering faster performance than plastic circuitry.
"CNTs offer the best long term electronic and physical attributes," Bao said.
Tom Abate | EurekAlert!
Making magnets flip like cats at room temperature
21.07.2016 | Johannes Gutenberg-Universität Mainz
NASA eyes first-ever carbon-nanotube mirrors for CubeSat telescope
13.07.2016 | NASA/Goddard Space Flight Center
Munich Physicists have developed a novel electron microscope that can visualize electromagnetic fields oscillating at frequencies of billions of cycles per second.
Temporally varying electromagnetic fields are the driving force behind the whole of electronics. Their polarities can change at mind-bogglingly fast rates, and...
Breakup of continents with two speed: Continents initially stretch very slowly along the future splitting zone, but then move apart very quickly before the onset of rupture. The final speed can be up to 20 times faster than in the first, slow extension phase.phases
Present-day continents were shaped hundreds of millions of years ago as the supercontinent Pangaea broke apart. Derived from Pangaea’s main fragments Gondwana...
Scaffolding and specialised workers help with the delivery – Heidelberg biochemists gain new insights into biogenesis
A type of scaffolding on which specialised workers ply their trade helps in the manufacturing process of the two subunits from which the ribosome – the protein...
Scientists at the Helmholtz Zentrum München have developed a new mass spectrometry imaging method which, for the first time, makes it possible to analyze hundreds of metabolites in fixed tissue samples. Their findings, published in the journal Nature Protocols, explain the new access to metabolic information, which will offer previously unexploited potential for tissue-based research and molecular diagnostics.
In biomedical research, working with tissue samples is indispensable because it permits insights into the biological reality of patients, for example, in...
Chemists at the University of Basel have succeeded in using computer simulations to elucidate transient structures in proteins. In the journal Angewandte Chemie, the researchers set out how computer simulations of details at the atomic level can be used to understand proteins’ modes of action.
Using computational chemistry, it is possible to characterize the motion of individual atoms of a molecule. Today, the latest simulation techniques allow...
15.07.2016 | Event News
15.07.2016 | Event News
11.07.2016 | Event News
22.07.2016 | Information Technology
22.07.2016 | Physics and Astronomy
22.07.2016 | Life Sciences


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zirconium sand process indonesia
PAPER OPEN ACCESS Related content Electrical conductivity ,, Zircon sand is a potential raw material for zirconia production Zircon sand in Bangka Island Indonesia is siding product of tin mining plant that has low economic value Therefore, some researchers such as Soepriyanto and Hidayat  did the effort to increase zircon (ZrSiO ,Global Zirconia Market, Global Zirconia Market was valued at USD 511 Bn in 2019 and is expected to reach at USD 768 Bn by 2027 at a CAGR of xx% over forecast period 2020-2027 Zirconia is a white crystalline oxide of zirconium Zirconia is produced by calcining zirconium compounds, exploiting its high thermal stabilityStudy of the Synthesis of Zirconia Powder from Zircon Sand ,, The zircon powder from Zircon Minerals Malaysia is a pure premium grade zircon sand milled 15 µm that contain ZrSiO 4, ZrO 2, HfO 2, SiO 2, Al 2 O 3, TiO 2, and Fe 2 O 3The monoclinic zirconia powders were synthesized from the zircon sand of Zircon Minerals Malaysia, by caustic fusion method at calcination temperatures between 500 °C to 800 °CFACTBOX, Apr 23, 2009· * Fractions of the sand are turned into sponge, then zirconium metal or zircaloy and hafnium -- used in control rods at some nuclear reactors to slow down or speed up the fission process,indonesia zircon sand mining process, indonesia zircon sand mining process you can get the price list and a birnith representative will contact you within one business day [get more]get price zircon sand mining equipment zircon sand mining equipment trimex industries mines and procures the raw materials from various mines and process them as per customer requirementsget price.
zircon extraction process, Indonesia zircon sand mining process - SBM Crusher - Zircon Industry Association zircon mined worldwide is used for the extraction of the metals zirconium and hafnium or their further processing to produce zirconium chemi- cals Read more zircon beneficiation processOceanic Sands, We procure and process Industrial Minerals like Garnet Sand, Zircon Sand, Rutile Sand, Ilmenite Sand, Sillimanite Sand and Leucoxene mainly from India, Indonesia, Australia, Thailand, Malaysia and African Countri Zircon Mineral Company is the only Industrial Minerals Processor in United Arab Emirates (UAE) with a capacity of 2,000-3,000 ,Global Zirconium Market (2020 to 2025), Nov 24, 2020· Zircon is widely used in ceramics and foundry, mostly in the form of sand and flour (milled sand), due to its various properties, such as the ability to bind with all organic and inorganic sand ,Zircon Rutile Ilmenite Sand Process Plant, China Zircon Rutile Ilmenite Sand Process Plant catalog of Zircon Beneficiation Plant, Ilmenite Beneficiation Separating Plant, Heavy Mineral Sand Benefication Processing Machine, High Tension Two Stage Tribo Electro Static Zircon Sand Separator provided by China manufacturer - Ganzhou Gelin Mining Machinery Co, Ltd, page1Zirconium: Ore Crusher, The principal commercial source of zirconium is the silicate mineral, zircon (ZrSiO4),which is found primarily in Australia, Brazil, India, Russia, South Africa and the United States, as well as in smaller deposits around the world 80% of zircon mining occurs in Australia and South Africa.
2008 Annual Report on Zircon Sand Market, concentrates pric Indonesia zirconium concentrate prices was at USD850/t CIF China 32 Domestic market 321 Output Chinese origin zircon sand bases mainly locate in Wenchang and Wanning in Hainan province and Zhanjiang in Guangdong province The total output of zircon sand ,PROCESSING ZIRCONIA THROUGH ZIRCON SAND ,, Zirconia had been made through smelting the zircon sand along with NaOH as a flux The zircon sand as the smelter feed was taken from CV Kurnia Alam Sejati mine at Palangkaraya, Middle Kalimantan Major content of the zircon sand was 2804% ZrO 2 and SiO 2 5122% with several minor oxides such as 054% HfO 2, 253% Fe 2O 3, 1053% TiO 2, 327% ,How zirconium is made, The vast majority of the zircon used in industry today originates in these sand and gravel deposits, from which the purest zircon is extracted and refined to be used as zirconium metals Less pure deposits are used in the form of stabilized zirconia for refractories and ceramic productsOptimization and Kinetics of Zirconium Oxychloride (ZOC ,, The extraction process is a mini-pilot plant unit as a nuclear-grade zirconia manufacture The dissolution optimization was carried out by dissolving ZOC solids of zircon sand processed products using HNO 3 in a container with some variation of contact time, HNO 3 concentration and temperature While the kinetics data was gained by extracting ,Zirconium Product Detail, The caustic decomposition of zircon sand is a common process route for the production of a high purity zirconium oxychloride This compound is used as a raw material for applications such as the production of titanium pigments and also as a pre-cursor for the production of a range of zirconium chemicals such as zirconium carbonate and zirconium ,.
Crystal Structure Analysis of Lithium Zirconate Prepared ,, semiconductor photocatalyst Zircon sand is a side product of tin mining plant with low economic value Due to a high abundance of this zircon sand in Indonesia, therefore an effort to prepare an electrode material, Li 2ZrO 3, from the zircon sand become an interesting subjectIn this research, the Li 2ZrO 3 was prepared by solidPROCESSING ZIRCONIA THROUGH ZIRCON SAND SMELTING ,, Zirconia had been made through smelting the zircon sand along with NaOH as a flux The zircon sand as the smelter feed was taken from CV Kurnia Alam Sejati mine at Palangkaraya, Middle Kalimantan Major content of the zircon sand was 2804% ZrO2 and SiO2 5122% with several minor oxides such as 054% HfO2, 253% Fe2O3, 1053% TiO2, 327% Al2O3 ,indonesia zircon sand, indonesia zircon sand Suppliers and ,, A wide variety of indonesia zircon sand options are available to you, such as indonesia You can also choose from energy & mining, building material shops indonesia zircon sand, as well as from powder, block indonesia zircon sand, and whether indonesia zircon sand is ,Homepage, Irvan Prima Pratama has been involved in exploration, project development, operation and product distribution of mineral sand We have asset and main production in Indonesia Irvan Prima Pratama headquatered in Surabaya, East Java, whereas mining and processing operation of Irvan Prima Pratama sand are located in Pangkalan Bun, Central KalimantanZirconium, Zirconium is a chemical element with the symbol Zr and atomic number 40 The name zirconium is taken from the name of the mineral zircon (the word is related to Persian zargun (zircon; zar-gun, "gold-like" or "as gold")), the most important source of zirconium It is a lustrous, grey-white, strong transition metal that closely resembles hafnium and, to a lesser extent, titanium.
Zircon Sand company list in Vietnam, KENEE Mining Corporation main product is Titanium Sand exploring and processing Beside that we also process byproducts like Zircon Rutile Total capacity are 100, 000 mt in titanium sand, 3, 000mt zircon rutile sand per month The quality of products as ,China Indonesia River Zircon Sand Mining Spirals in ,, Indonesia river zircon sand mining spirals in Kalimantan island Our factory produce full sets mining equipments for separating titanium, chrome, zircon sand, rutile ore, monazite, ilmenite, magnetic iron ore, tin ore and so onWhat is Zircon Sand? What is Zircon Sand used for ,, About Zircon Zircon, also referred to as zirconium silicate (ZrSiO 4), is a co-product from the mining and processing of ancient heavy mineral sand depositsMined mainly in Australia and South Africa, zircon can be used either in its coarse sand form or milled to a fine powder Its properties ensure that it is used in many everyday products, including ceramic tiles and medical implants, as ,Zircon Sand Indonesia, our company purchase zircon sand in a large quantity at 2000MT/month,the request as below: ZrO2 45%-65% Fe2O3 015%max TiO2 010%max 40-100mesh all pass the better origin :indonesia,australia,south africa please feel free contact with me ,if you,Zirconium Oxide X, Zircon Oxides are synthesizedfrom zircon sand as raw minerals Concentrate zircon sand obtained from Indonesian mines; most of the proven reserves of these raw minerals are found in the Central and West Kalimantan provincesSpecific reference on the synthesis of the zirconium oxides could be found in another paper .
zircon mining indonesia, zircon mining indonesia Suppliers ,, Alibaba offers 1,126 zircon mining indonesia products About 1% of these are Other Mining Machin A wide variety of zircon mining indonesia options are available to you, such as local service location, showroom location, and after-sales service providedZirconium Market | Growth, Trends, and Forecast (2020, Zircon is widely used in ceramics and foundry, mostly in the form of sand and flour (milled sand), due to its various properties, such as the ability to bind with all organic and inorganic sand binders, low acidity, low thermal expansion coefficient and high spatial stability at increased temperatures, chemical stability at high temperatures, and good recyclability,Kajian Konsep Teknologi Pengolahan Pasir Zirkon Lokal Yang ,, The existence of natural minerals in Indonesia containing zirconium (Zr) and REO lies in 13 regions, ranging from Aceh to West Papua province Based on those aforementioned aspects, the goal of this research is to conduct the study of integrated technology of local zircon sand ,zircon sand grinding mill, Aug 25, 2016· The next video is starting stop Loading,194 ZIRCONIUM AND HAFNIUM, Zirconium metal and hafnium metal were produced from zirconium chemical intermediates by one domestic producer , A fourth company was planning to process tailings from mineral sand , Indonesia 110 110 NA Mozambique 51 50 1,100.
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Advanced Ultra High-Gain Material Exhibited in Booth #3141 at InfoComm
CERRITOS, Calif., June 9, 2009 — Elite Screens, Inc. an innovative company that specializes in affordable high quality projector screens, today announced its StarBright7 series of ultra high 7-gain materials is now available as a fixed frame screen in a wide array of sizes up to 200 inches diagonal. This new material is on exhibit in booth #3141 at InfoComm in Orlando, June 17-19, 2009.
Using an advanced high contrast filter surface coating, StarBright7 absorbs ambient light while boosting black level contrast with enhanced color reproduction, creating brilliant, clear and easy-to see images, even in well-lighted environments.
“Ambient light is the mortal enemy of front projection screens. It creates a washed out image when the curtains are open or when the lights are on,” said David Rodgers, marketing manager, Elite Screens, Inc. “Our StarBright7 material has a reflectivity that is remarkably bright. It also absorbs ambient light so effectively that even lower-lumen projectors can create a fantastic image in either a dark or well-lit room.”
Elite’s StarBright7 material is created using cutting edge technology. Starbright7, is seven-gain or seven times brighter than the typical matte white (1.0 gain magnesium carbonate control) materials. It utilizes a multiple-layered design to concentrate reflected light into a bright image with succeeding layers that diffuse the intensity to control hot-spotting and eliminate the wash-out effect by filtering out ambient light for a clear picture.
Pricing, Availability, Warranty
Starting at $1089, Elite Screen’s StarBright7 material is currently available in its Fixed Frame, HOME2, VMAX Plus3 and Kestrel series of screens, in standard sizes of 76 to 200 inches in 16:9 format. Custom sizes are also available. Each screen comes with a two-year limited warranty.
About Elite Screens, Inc.
Elite Screens Inc. is a California-based company founded in 2004 by manufacturing veterans from the AV/IT/Custom industry. We specialize in commercial and home-theater projection screens for the retail and custom install sales channels. We produce a wide variety of electric, manual roll-up, fixed frame and portable projection screens with a broad array of sizes, formats and materials. Products are sold worldwide through our offices in the US, Germany, China and Taiwan. Elite Screens, Inc. is headquartered at 16410 Manning Way, Cerritos, CA 90703. For more information, please call 877-511-1211 or visit http://www.elitescreens.com.
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Carter – Thomason CloseSure System
With Carter-Thomason, surgeons can perform a complete closure of accesses, with safety and efficiency. Indicated for obese patients.
Specification: Carter-Thomason is composed of two parts:. a pilot guide and a suture guide
After several years of implementation in different surgical specialties, the performance of PVDF polymer has proven its superiority when compared to polypropylene. The PVDF preserves the integrity of the surface and stability of the fiber, bringing safety to patients for long periods.


1.High Security: Aluminum Alloy Shrouds with ABS Lids ensure a much longer service life and better resistance to outside punches. Specific module support with high structural reliability and high electrical safety; Customized and developed PCB acquisition scheme, fully automatic laser welding ensures circuit stability and electrical safety; BMS CAN/RS485 (Optional) communication offers accurate SOC display.
2.High Energy Density: Lithium iron phosphate battery cell with high energy density and small size, provides large endurance, safe performance, and service life of 3-5 years.
3.Low temperature resistance: It can be charged at 0℃ and discharged at – 10℃.
4.High temperature resistance: Normal charging and discharging at 55℃.
Net Weight: 12kg
Package Material: Aluminum Alloy Shrouds with ABS Lids
Nominal Voltage: 51.2V
Nominal Capacity: 30Ah


Keeping PV solar panels clean is vital to maintaining optimal efficiency. This is crucial with all PV devices, but keeping large scale solar farms in hot and often dusty countries can be an especially mammoth task. Self-cleaning solar panels help to keep the surfaces of PV panels cleaner for longer, keeping them working at maximum efficiency.
In hot, dusty conditions, a solar cell can lose up to 20% of its efficiency by being shaded by dust and dirt. But even here in the UK, dust, pollen and other airbourne particles can build up on our solar panels, just like they do on our cars if not regularly cleaned. During heatwaves, these can become “baked on” by the sun, making them harder to be washed away by the next rainfall.
Self-cleaning, hydrophobic coatings are designed to minimise the need for cleaning and maintaining the surface of solar panels. These coatings are sprayed onto the surface of the panel and prevent water from collecting or sticking to the surface. As water rolls off the surface of the panel, dust and other contaminants and picked up and washed away, keeping the panel cleaner for longer.
Which self-cleaning coatings are being developed?
A number of self-cleaning coatings for solar panels are currently in development, and are mostly intended for use on large-scale solar farms in hot, dry countries where dust is often a problem. One coating, designed to artificially replicate the surface of the lotus leaf, is currently being developed by Oak Ridge National Laboratory, Tennesee, USA. This coating is designed specifically for application to concave mirrors and heliostats used on solar farms. It is designed to provide up to a 90% reduction in mirror cleaning, whilst improving the level of sunlight reflected by 20%.
A similar technology is being developed by researchers at the University of Science and Technology (China) and Xi’an Technology University (China) and Cardiff University (UK). Together, they are working on the EU FP7 Laser NaMi project, in which micro-electric circuits are printed onto the surface of solar panels. These circuits are smaller than the wavelength of light, which in turn prevents light from being reflected from the surface of the panel and instead traps it, allowing more light to be harnessed for the generation of electricity. This technology also helps to make the surface of the solar panel hydrophobic and therefore self-cleaning. Water is unable to stick to the surface and particles of dirt are washed away more easily.
Domestic solar panels
While the world of self-cleaning solar panel technology is set to improve the efficiency of solar farms worldwide, there are also options on the market for hydrophobic coatings for domestic solar panels, though their effectiveness is still disputed. Self-cleaning solar panels are viable on a larger scale, on solar farms where individual cleaning would be time-consuming and expensive. Many argue that self-cleaning solar panels need to be mounted at a specific angle for their cleaning capabilities to function property and for water to flow away effectively, something which is harder to adapt to in a domestic environment. Nevertheless, some domestic solar panels are now marketed as “self cleaning” and coatings which can be bought and applied separately are also on the market.
Whether you own domestic self-cleaning solar panels or not, it is still important to give your panels regular attention in order to maximise their efficiency. For more information on keeping your solar panels clean, take a look at this article.
Image sourced: JollyrogertagscleaninghydrophobicPVsolar panels


Liquidmetal ® Technologies Inc. (OTCBB: LQMT ) today announced a strategic partnership with ENGEL AUSTRIA GmbH, the world’s technology leader of injection molding machines with revenues exceeding $800 million for the fiscal year ended March 31, 2011. As pioneers in the development of plastic injection molding technology, ENGEL will now initiate a similar process with the next generation of injection moldable alloys known as Liquidmetal. “ENGEL is a leading force in the utilization of the newest advancements in materials technology for next-generation products and we envision this partnership with Liquidmetal as a key strategic step in the evolution of injection molding,” said Mark Sankovitch, President and CEO of ENGEL North America. Liquidmetal also announced the creation and launch of a Certified Liquidmetal Partners Program, with ENGEL as the first certified partner. Under the details of this program each step in the process of designing and producing Liquidmetal products and services will be performed by partners who have met demanding certification requirements to ensure that customers are provided consistent, high-quality products and support services. Thomas Steipp, Liquidmetal President and CEO, commented, “We are excited about the opportunity to work with ENGEL to develop the next generation of injection molding machines incorporating the exceptional qualities of our Liquidmetal technology. By partnering with technology and manufacturing leaders such as ENGEL, we ensure our customers of extraordinary quality and unlimited ability to scale production.” Liquidmetal Technologies is a leading supplier of bulk amorphous glass products branded as Liquidmetal. This technology allows innovative companies to replace complex machined parts with injection molded components. In certain applications, this offers stronger, lighter, more corrosion-resistant parts at significantly lower prices. For more information, go to www.liquidmetal.com. This press release may contain “forward-looking statements” that involve risks and uncertainties, including statements regarding our plans, future events, objectives, expectations, forecasts, or assumptions. Any statement in this press release that is not a statement of historical fact is a forward-looking statement, and in some cases, words such as "believe," "estimate," "project," "expect," “intend,” “may," "anticipate," "plans," "seeks," and similar expressions identify forward-looking statements. These statements involve risks and uncertainties that could cause actual outcomes and results to differ materially from the anticipated outcomes or result, and undue reliance should not be placed on these statements. These risks and uncertainties may include: our limited operating history in developing and manufacturing products from bulk amorphous alloys; the adoption of our alloys by customers; the commercial success of our customer’s products; our ability to identify, develop, and commercialize new applications for our alloys; competition with suppliers of incumbent materials; the development of new materials that render our alloys obsolete; the ability to manage our anticipated growth; our limited direct experience in manufacturing bulk alloy products; scaling-up our manufacturing facilities; protecting our intellectual property; problems associated with manufacturing and selling our alloys outside of the United States; and other risks and uncertainties discussed in filings made with the Securities and Exchange Commission (including risks described in subsequent reports on Form 10-Q, Form 10-K, Form 8-K, and other filings). Liquidmetal Technologies disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise.


PARSIPPANY, N.J., U.S.A. – April 9, 2018 – Beginning in April 2018, Sun Chemical and its parent company, DIC Corporation, will increase the production capacity of its DAILUBE® extreme pressure additives by 6,000 tons per annum at its eco-friendly plant in Kashima, Japan.
The move will better serve customers around the globe as well as promote and deliver its trusted and market leading sulfurized extreme pressure additives into new and existing markets.
Optimized for metalworking fluids used in cutting, forming and rolling, DAILUBE extreme pressure additives are light in color, low odor and available in a range of chemistries, including olefin, lard, vegetable, ester, and fatty acid.
Opened in 1972, the 600,000-square meter Kashima plant is the ideal location for capacity expansion due to its dedication to eco-friendly production processes, award-winning achievements and technological legacy. Along with extreme pressure sulfur additives, the facility produces organic pigments, bases for inks, metal carboxylates, and polyphenylene sulfide (PPS) resins.
To reduce environmental impact, the Kashima plant utilizes steam generation facilities, biomass boilers, solar panels, and windmills to power the majority of its production processes. The facility has received various certifications and honors related to quality management, hygiene, and safety, and serves as a keystone to Sun Chemical and DIC Corporation’s commitment to quality, innovation and environmental responsibility.
About Sun Chemical
Sun Chemical, a member of the DIC group, is a leading producer of printing inks, coatings and supplies, pigments, polymers, liquid compounds, solid compounds, and application materials. Together with DIC, Sun Chemical has annual sales of more than $7.5 billion and over 20,000 employees supporting customers around the world.
Sun Chemical Corporation is a subsidiary of Sun Chemical Group Coöperatief U.A., the Netherlands, and is headquartered in Parsippany, New Jersey, U.S.A. For more information, please visit our Web site at sunchemical.com.


We have a lot of screw conveyors of multiple sizes and carrying capabilities at your disposal. They are designed for cement and other bulk materials that are used in the construction materials industry such as sand, limestone, flying ash, gypsum, filler, etc.
- Screw Conveyor Types
Tubular Screw Conveyors
The screw conveyors SCUTTI CTS series are available in a wide range of sizes, and capacities. They are designed to convey cement and many bulk materials moderately abrasive and fluid commonly used in batching plants, such as sand, limestone, fly ash, gypsum, etc.
Standards sizes are from Ø114 to Ø323mm with lengths up to 13m. Available on demand bigger diameters such as Ø407, Ø457 and over. Direct-mounted drive units in standard ratios 1/5, 1/7, 1/10. Special manufacture for heavy products are available on demand.
The CTS screws are supplied with the following standard configuration:
- 1 no. inlet + 1 no. outlet plain spigot with fixed inclination.
- 1 no. Non drive end bearing type STL
- RM gearbox direct-mounted at inlet side
- Asynchronous electric motor 1400 RPM flanged to the gearbox
- 1 no. Inspection door under the inlet
- 1 no. Inspection door under each intermediate bearing
- 1 no. Intermediate hanger bearing every 3m about
- 2 nos. Lifting eyes each screw’s part
ACCESSORIES AVAILABLE ON DEMAND:
- Ball joints at inlets/outlets with or without flanges
- Conical inlets/outlets, fixed incline, with or without flanges.
- Loose plain flanges for inlets/outlets spigots.
- Base and tube supports suitable for screws installation.
- Anti-wear flightings from Creusabro or Hardox.
- Anti-wear tips on standard flights.
- Chain and belt drives
- Double speed motors
U-type Screw Conveyors
The U-type screw conveyors, also known as open-type screw conveyors, are commonly used for industrial process. They are available in standard sizes ranging from Ø150 up to Ø350 mm with lengths up to 10m. They have direct drive unit and powder proof covers.
"U" type special screws are also used in the precast industry to transport fresh concrete from one point to another within the factory. For such applications the screws are made by anti-wear flightings from Hardox, without intermediate bearings.
Vertical Screw Conveyors - Elevators
The vertical screw conveyors are available in diameters ranging from Ø193 to Ø458 mm with a direct movement using pulleys. The carrying height of the material that depends on the application needs, defines the remaining dimensions.
The purpose of these screws is the vertically carry (lift) of large bulk materials quantities. They require an insignificant installation space, are easy to maintain and do not pollute the environment.
Vertical screws are manufactured with cast iron intermediate bearings and without end-bearing bearings on the bottom side while high quality components and special know-how can guarantee high performance and long service life.


Recently, electromagnetic radiation in the terahertz frequency range, best known as Terahertz radiation (hereafter abbreviated as THz), has emerged as one of the most promising measurement techniques for a variety of applications in science and engineering. THz, residing at a relatively unexplored region between the microwave and infrared, roughly 0.1-10THz, is one of the last frontiers in the electromagnetic spectrum. Unlike X-ray, THz causes no known harm to the human body and the materials being examined. THz can penetrate many common gases, non-polar liquids, and non-metallic solids including air, plastics, gasoline, paper, plant material, clothing, fatty tissue, and composites. Because they lie in a frequency region in which molecular resonances dominate, the absorption spectra of THz exhibit distinct signatures for substances such as water vapor, polar plastics, certain gases, DNA, crystalline solids, biofuel, and explosives. These advantages make THz a particularly attractive characterization tool in the areas of automotive, aviation, food, energy, materials, pharmaceuticals, medical diagnosis, forensics, defense, and homeland security. In fact, THz’s ability to penetrate thick foam-like materials has made it the de facto technique to inspect the foam insulation structures of NASA’s space shuttle fleet, the application that brought this technology to the interest of CNDE.
For the past five years, under the support of NASA, the Air Force, and the Army, CNDE has expanded its state-of-the-art modeling and processing capabilities further into THz technology. Significant progress had been made in addressing the inspection problem of the space shuttle’s external tank foam insulation as well as in providing assistance to Air Force Research Laboratory’s THz development. Elsewhere at ISU, faculty and researchers from various science and engineering disciplines have also quickly recognized the potential of THz technology. Driven by these needs, the acquisition of THz systems for imaging and spectroscopy was realized in 2008 via a major funding boost from the National Science Foundation’s Major Research Instrumentation program, and a new $0.5M THz research facility was established. With this new THz facility, a number of applications in physics, chemistry and engineering have been extensively studied, including the detection of chemical contamination in drinking water pipe systems, solvation of ionic liquids, fundamental studies of multiphase combustion and flow processes, and nondestructive evaluation of composite materials. The growing potential of THz has been further explored in inspecting many other advanced materials such as ceramic tiles and high-molecular weight fiber polymers used in military personal protection applications. It is evident that we have extended THz application opportunities well into the full spectrum of science and engineering disciplines with significant benefits in both research and education to the entire ISU community.


The magazine PURE distinguishes 10 products to serve as examples for sustainable design. Careful utilisation of resources, energetic efficiency, recyclability and quality of materials and processing are important criteria for the assessment.
With its “Spin-chair”, designed by Martin Ballendat, Voglauer was again able to convince the panel of judges: “Timeless elegance in design meets high seating comfort and clever functionality all the way to a capacity for stacking. The solid wood is gained from sustainable forestry and processed with excellent craftsmanship. Eco-labelled furniture production in Austria.”
The „Spin-chair” is an extraordinary interpretation of the classic and timeless dining chair in wood. The specially contoured line shapes combine the armrest with the footrest and the backrest into one integrated structure.


We produce lead at Red Dog and Pend Oreille operations and refine it at Trail Operations. Lead is used to make lead-acid batteries. These batteries power cars, including electric and hybrid vehicles, and are used in energy storage for renewable energy sources such as solar cells and wind turbines. Lead is also used in radiation shielding and to protect underwater power and communications cables. In 2015, Teck produced 117,600 tonnes of lead in concentrate.
View Lead Concentrate Safety Data Sheet:


Anti-Bacterial Cleaning Cloths
One of the most hygienic anti-bacterial cleaning cloths available
Open cellular structure makes the cloth very effective for collecting food and dirt particles and removing stubborn stains
Incorporates an anti-bacterial agent that inhibits bacterial growth on the cloth.
Viscose Polyester Blend offers excellent durability, strength and high absorbency.
Various colours available allowing colour coding and prevents cross contamination
No detailed specifications are available for this product.
There are no downloads for this product.


The 70 MM White PP Plastic Screw Cap with Gasket 6TPI 3/4" Threaded Reducer, FS-70 TE, is a highly versatile and efficient sealing solution for various containers. Crafted from premium quality polypropylene (PP), this screw cap is renowned for its durability, chemical resistance, and ability to withstand a wide range of temperatures. The inclusion of a gasket ensures a tight and secure seal, preventing leaks and preserving the contents.
One of the primary applications of this screw cap is in the packaging industry, where it is used to seal containers holding liquids, powders, or granules. Its compatibility with various types of containers, including bottles and jars made of plastic or glass, makes it a popular choice across sectors like food and beverage, pharmaceuticals, cosmetics, and chemicals.
The 3/4" threaded reducer feature of the FS-70 TE model allows for easy and precise control of the flow of contents, making it ideal for dispensing liquids or fine-grained materials. This feature also extends its use to applications that require controlled dispensing, such as in laboratory settings or in the food service industry.
One key advantage of using PP for this screw cap is its excellent resistance to fatigue, meaning it maintains its shape and function even after repeated use. This property, combined with its lightweight nature, makes it an eco-friendly and cost-effective option.
Please note that the cap is sold separately, allowing for customization and flexibility in choosing the right sealing solution for your specific needs. By opting for the 70 MM White PP Plastic Screw Cap with Gasket 6TPI 3/4" Threaded Reducer, FS-70 TE, you are choosing a reliable, versatile, and efficient sealing solution that can cater to a wide range of applications across various industries.


ASTM A709-50W is a standard specification for structural steel primarily in the fabrication of steel bridges.ASTM A709-50W covers high strength,low allow steel structural shapes,plates and bars.The atmospheric corrosion resistance of this steel in most environments is substantially better than carbon steel with or without steel addition. results for this questionFeedbackA709Gr50,A709Gr.50,A709 Grade 50,A709 Gr 50,GradeA709 Grade 50 steel grade is a high strength low alloy structural carbon steel used in building bridge projects.Compare A709 Gr.100,and A709 Gr.50w grade,A709 Gr.50 has a lowest yield strength in 345Mpa in usual.A 709 Gr.50 requests killed or semi-killed in manufacture.BBNSTEEL supply A709 Gr.50 many years in China mainland bridge projects.We also have many stock sizes in A709 Gr.50 for
A709 Grade 50W steel plates are widely used in construction machinery,mining machinery,truck,bridges,pressure vessels,etc.,structures building.ASTM A709 Gr.50W high tensile plates chemical composition and mechanical properties ASTM A709 Grade 50W/A709 Gr.50W high tensile plates are hot selling products of BBN steel.
May 17,2019 a709 gr 50w specs#0183;Structural Steel (AASHTO M270/ASTM A709) All structural steel will be AASHTO M270/ASTM A709 Grade 36 (F y = 36 ksi) or Grade 50 (F y = 50 ksi) and structural steel HP piling will be AASHTO M270/ASTM A709 Grade 50S (F y = 50 ksi) except where weathering steel (AASHTO M270/ASTM A709 Grade 50W steel) is indicated on the Design Layout or in special cases.SeeA709 ASTM A709 A709 Steel Plate Kloeckner Metals A709 Grade 50W steel is a standard specification for structural steel in bridges with weathering capabilities.With a corrosion index of 6.0 or higher,ASTM A709-50W has substantially better atmosphere corrosion resistance than carbon steels even with the addition of steel.
21 rows a709 gr 50w specs#0183;This page cover the A709 Gr.50 chemical element,Mechanical Properties,A709 Gr.50A709 Gr.50W Valve,A709 Gr.50W flanges,A709 Gr.50W Pipe A709 Gr.50W angle bars,A709 Gr.50W flanges,Pipe Fitting,Steel Pipe,Heat Exchanger and Reducer,Gasket,Tee,Pipe Fitting,Tube Plate,have all specifications.With many yeas production experience,strict control A709 Gr.50W chemical composition and A709 Gr.50W mechanical properties.
Was this helpful?People also askWhat is A709 gr.50?What is A709 gr.50?A709 Gr.50 can be supplied as steel plate/ sheet,round steel bar,steel tube/pipe,steel stripe,steel billet,steel ingot,steel wire rods.A709 Gr.50 steelA709 Grade HPS 70W|A709 Gr.HPS 70W steel plate__SteelASTM A709 Grade 50W,A709 Gr.50W BBNSTEEL is specialized in supplying ASTM A709 steel plate in A709 Grade 50W,A709 Gr.50W,A709 Gr 50W.A709 Grade 100W,A709Gr.100W ste
2 rows a709 gr 50w specs#0183;A high-strength,low-alloy structural steel plate utilized primarily in the manufacture of bridges.ASTM A709 / A709M - 17 Standard Specification for 1.1.1 Grades 36 ,50 ,50S [345S],50W [345W],and 50CR [345CR] are also included in Specifications A36/A36M,A572/A572M,A992/A992M,A588/A588M,and A1010/A1010M (UNS S41003),respectively.
SpecificationsPurposeAvailabilityExamplesQualificationInternational1.1 a709 gr 50w specs#160;This specification covers carbon and high-strength low-alloy steel structural shapes,plates,and bars,quenched and tempered alloy steel,and stainless steel for structural plates intended for use in bridges.Twelve grades are available in five yield strength levels as follows 1.2 a709 gr 50w specs#160;Grade HPS 70W [HPS 485W] or HPS 100W [HPS 690W] shall not be substituted for Grades 36 ,50 ,50S [345S],50W [345W],or HPS 50W [HPS 345W].Grade 50W [345W],or HPS 50W [HPS 345W] shall not be substituted for GrSee more on astmASTM A709 - SSABThe ASTM A709 is the Standard Specification for Structural Steel for Bridges and encompasses carbon,high-strength low-alloy,and quenched and tempered alloy steels used as structural plates in the construction of bridges.SSAB offers the following five grades of A709; 36,50,50W,HPS 50W and HPS 70W.The three weather grades of 50W,HPS 50W,and HPS 70W have an ASTM G101 enhancedASTM A709 GR.50W I Beam Steel ----Katalor EnterprisesThe ASTM A709 Grade 50W I Beam maintains a tensile yield strength of 50,000 psi and an ultimate tensile strength of 65,300 psi.It is also highly weldable and can produce excellent quality welded joints.The high-strength,ASTM A709 Grade 50W I Beam can be used in:I-Beams,Structural Angles,Wide Flange Beams,Structural Steel Channels,Composition
Carbon and high-strength low alloy steels meant for structural purposes in various forms,plates and bars are covered by specification ASTM A709.These components are first quenched,following which the alloy steel is tempered.The use of these structural plates or ASTM A709-50W Corten Steel Welded Pipe is specifically designed for use in bridges.Heat analysis is often performed on these samples toASTM A709 Grade 50W Type C ASTM A709/A709M - BBNPhysical performance parameters of ASTM A709 Grade 50W Type C ASTM A709/A709M are mainly indicated by density,poisson's ratio,thermal conductivity,specific thermal capacity,coefficient of thermal expansion,modulus of elasticity,electrical resistance value,etc.Temperature.( a709 gr 50w specs#176;C)
BBNSTEEL is specialized in supplying ASTM A709 steel plate in A709 Grade 50W,A709 Gr.50W,A709 Gr 50W.ASTM A709 Steel Plate - Grade 36,50,50W ,HPS 50W ,HPS Phosphorus max 0.030-0.040% Sulfur max 0.030-0.050% Silicon* 0.40% max Copper min 0.20% * Manganese content of 0.85 to 1.35 % and silicon content of 0.15 to 0.40 % is required for grade 36 shapes with flange thickness over 3 in.Grade 50 (max 4 thick) Carbon max 0.23% Manganese max 1.35% Phosphorus max 0.030% Sulfur max 0.030% Silicon 0.15-0.40% Columbium 0.005-0.15% Vanadium 0.01-0.15% Grade 50W
Grade 50 a709 gr 50w specsgt;= 485 MPa a709 gr 50w specsgt;= 70300 psi Grade 50W Tensile Strength,Yield a709 gr 50w specsgt;= 345 MPa a709 gr 50w specsgt;= 50000 psi Elongation at Break 18 % 18 % In 200 mm 21 % 21 % In 50 mm.Modulus of Elasticity 205 GPa 29700 ksi Typical for steel Bulk Modulus 160 GPa 23200 ksi Typical for steel.Poissons Ratio 0.29 0.29 Calculated Shear Modulus 80.0 GPa 11600 ksi Typical for steel.Electrical PropertiesASTM A709 steelASTM A709 steel.A high-strength,low-alloy structural steel plate utilized primarily in the manufacture of bridges.Gnee steel stocks A709 Grade 36,A709 Grade 50 and A709 Grade 50W.These grades are often specified with Charpy tests referencing the specific zone or
A709 hps100w,A709Gr.hps100w,A709 Grade hps100w,A709 Gr hps100w,A709 hps100wASTM A709/A709M-07 - Standard Specification forGrade 50W [345W],or HPS 50W [HPS 345W] shall not be substituted for Grades 36 ,50  or 50S [345S] without agreement between the purchaser and the supplier.1.3 When the steel is to be welded,it is presupposed that a welding procedure suitable for the grade of steel and intended use or service will be utilized.
Grade 50W [345W],or HPS 50W [HPS 345W] shall not be substituted for Grades 36 ,50  or 50S [345S] without agreement between the purchaser and the supplier.1.3 When the steel is to be welded,it is presupposed that a welding procedure suitable for the grade of steel and intended use or service will be utilized.ASTM Weathering Steel Specifications Central Steel ServiceASTM A709-50W is a standard specification for structural steel in bridges.ASTM A709-50W covers high strength,low allow steel structural shapes,plates and bars.The atmospheric corrosion resistance of this steel in most environments is substantially better than carbon steel with or without steel addition.
HPS 50W 0.375 - 4.00 Up to 152 Up to 1020** 0.375 - 4.00 HPS 70W 0.375 - 0.750 Up to 120 Inquire 0.375 - 0.750 Plate Specifications Data Sheet Overview EVRAZ North America offers high-quality bridge plate produced in the United States that meets the requirements of AASHTO specification M270,ASTM A709 and customized structural plate specifications.Corten Steel ASTM A709-50W Pipe,ASTM A709 GR.50WASTM A709-50W Pipes Manufacturer.Marc Steel is a well-known ASTM A709-50W Corten Steel Pipes supplier in the industry.ASME SA709-50W Corten Weathering Steel Tubing offers a number of outstanding features like durability,reliability,corrosion resistance and more.In tune by means of dissimilar requirements of our plentiful customers,we modify the whole collection of ASTM A709-50W
Jul 13,2009 a709 gr 50w specs#0183;A 709 Gr.50W is equivalent to A 588 (except the A 709 carries some additional Charpy testing requirements).S stands for structural.(I thought it oughta stand for seismic,but no one asked me.) 50S is the equivalent (plus some Charpy testing requirements) of A 992,structural shapes.It has a cap on ultimate strength and on yield-to File Size 1MBPage Count 1ASTM A709 Steel Plate - ASTM A709 Steel WarehouseASTM A709 Specifications A709 is the standard specification for structural steel bridges.Covers carbon,HSLA,QT,and stainless steel plates,bars,and shapes for structural use in bridges.Includes grades 36,50,70,and 100,with designations for enhanced atmospheric corrosion resistance (W).
Oct 13,2020 a709 gr 50w specs#0183;A709 Chemical Composition.A709 Grade 50 (Max 4 Thick) A709 Grade 50W Type A.A709 GRADEAPPLICATIONY1Cr18Ni9Improve the machinability,ablation resistance.Suitable for automatic lathe prod1Cr18Ni9High strength after cold forming,but elongation than 1 cr17ni7 slightly worse.U1Cr18Mn10Ni5Mo3NOf urea with good corrosion resistance,can produce urea corrosion of the equip1Cr17Ni7High strength after cold forming.Used in railway vehicle,conveyor belt,bolt an 21 rows on steel-gradesASTM-A709 Standard Specification for Structural Steel Grade 50W [345W],or HPS 50W [HPS 345W] shall not be substituted for Grades 36 ,50  or 50S [345S] without agreement between the purchaser and the supplier.1.3 When the steel is to be welded,it is presupposed that a welding procedure suitable for the grade of steel and intended use or service will be utilized.
HPS 50W Steels for Bridges ASTM A709-01 first added grade HPS 50W.This high performance bridge steel has the identical chemistry as HPS 70W.It will most often be produced by as-rolled or control-rolled practices.ASTM A709 also allows it to be Thermo-Mechanical Controlled Processed (TMCP),with or without accelerated cooling,normalized,quenchedKeeping tabs on current ASTM specifications ARE YOU A53 Gr B 35 60 A500 Gr.B 42 58 46 58 Gr.C 46 62 50 62 A501 Gr.A 36 58 Gr.B 50 70 A529c Gr.50 50 65-100 Gr.55 55 70-100 A709 36 36 58-80b A1043d 36 36-52 58 50 50-65 65 High-Strength Low-Alloy A572 Gr.42 42 60 Gr.50 50 65 Gr.55 55 70 Gr.60e 60 75 Gr.65e 65 80 A618f Gr.Ia,Ib II 50g 70g Gr.III 50 65 A709 50 50 65 50S 50-65 65 50W
a709 gr 50 steelastm a709astm a709 grade 50a709 grade 50grade 50w steelastm a709 grade 50 propertiesSome results are removed in response to a notice of local law requirement.For more information,please see here.12345Nextsteelwise - AISCGr.50 50 65100 Gr.55 55 70100 A709 36 36 5880b A1043d,k 36 3652 58 50 5065 65 A1085 Gr.A 50 65 Gr.42 42 60 Gr.50 50 65 A572 Gr.55 55 70 Gr.60e 60 75 Gr.65e 65 80 A618f Gr.lak,lb II 50g 70g Gr.III 50 65 50 50 65 A709 50S 5065 65 50W 50 70 50 50h 65h A913 60 60 75 65 65 80 70 70 90 A992 50i 65i A1065k Gr.50j 50 60


The supporting idea of Creation is the image of the honeycomb, the links between people, and their interaction with nature. The honeycomb shape is perfect and cost-effective, as less building material is used to create a larger area. One of the most adaptable structures found in nature for building is the structure of the honeycomb. Man has borrowed this form from the world of bees. Because of its links to the pagan world and the special importance of the bee in it – the afterlife of the pagan world was imagined as a meadow to which bees carried the souls of the dead – the honeycomb can also be interpellated as a cosmic fabric.
The artist’s experiments explore the relationship between wax and organic materials and different types of textiles. This helped the artist to discover and highlight the properties of this material – elasticity, smell, and water resistance.


With this insulated bottle, we are helping nature and saying goodbye to disposable plastic bottles. Plastic is one of the most harmful to nature due to its high biodegradation resistance. Para la Naturaleza offers this bottle as a way to minimize the use of disposable plastic bottles that harm the ecosystems. Double-walled, vacuum-insulated bottle designed to survive your adventures.
This stainless steel bottle has the ability to maintain the temperature of its contents for hours: hot for 11 hours and cold for up to 38 hours. Its sealed lid prevents spills and has an easy-to-carry grip. It is BPA-free, which means it has no chemicals that can harm you and contaminate your drink.
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BETHEL, Conn., Oct. 18, 2018 /PRNewswire-PRWeb/ --áMemry Corporation, a vertically integrated world leader in medical
On Oct 25th and Nov 8th, Dr. Andrew Pequegnat will host a live webinar as he explores state-of-the-art femtosecond laser machining processes with a specific focus on Nitinol medical devices. To register, please visit https://www.memry.com.
Nitinol's unique super-elastic properties have made it an essential material in the medical device engineer's toolbox. Nitinol has become a staple in the cardiovascular, neurovascular, endovascular, peripheral vascular, orthopedic, spinal, urology and dental arenas with applications ranging from neurovascular stents and heart valve frames to orthopedic anchors and orthodontic archwires.
Over the last two decades countless advancements in medical device technologies have been made possible not only due to the application of Nitinol but also advancements in the state-of-the-art manufacturing technologies required to produce such devices. Laser manufacturing technologies have been at the forefront of these innovations. The non-contact, precision and low thermal input characteristics of laser processes have made lasers the technology of choice for welding, cutting/ablation and marking.
More specifically, the extreme thermal-sensitivity of Nitinol's microstructure and thermomechanical performance makes low heat input secondary processes a necessity. In this paper, state-of-the-art femtosecond laser machining processes will be presented with a specific focus on manufacturing Nitinol medical devices.
About Memry Corporation:
Memry is a vertically integrated world leader in medical applications requiring Nitinol alloys and complex manufacturing processes. Our production capabilities consist of a wide variety of fabrication, finishing, testing and quality processes, which together deliver the highest quality Nitinol components. Laser cutting, shape setting, laser welding, wire EDM, electropolishing and surface treatments are just a few of our core capabilities. Our engineers bring decades of Nitinol experience to every project, providing valuable insight on how the material reacts in real-world conditions. These initial discussions will translate into time savings and cost effectiveness for your component project. Let the Memry experts assist you in selecting the right path to your precision component, manufactured from raw Nitinol wire, tube, strip or sheet.
SOURCE Memry Corporation
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National cement mills ltd ichanagar bangladesh ,national cement mills ltd. 174 views claim add To list. country: bangladesh. city: chittagong business type: cement manufacturer. address: ichanagar, bangladesh phone number: 8204 ext. int. phone number: 880 3125Chatear en línea
There are four series of products including crushing, sand making, building materials, and grinding, with excellent performance and complete models
national cement mills ltd. 174 views claim add To list. country: bangladesh. city: chittagong business type: cement manufacturer. address: ichanagar, bangladesh phone number: 8204 ext. int. phone number: 880 3125 consultancy & construction, cement industries, consultancy & construction chittagong, cement industries chittagong national cement mills limited chittagong id 27559apr 27, 2019 type: cement grinding mill. area: chittagong. annual production: 0.42 million tonnes of cement under premier brand. owner: national cement mills limited
national cement mills limited material processing. material processing. hna cement mills ltd annual report zenit.national cement company ltd national cement company limited, a member of the devki group Of companies was formed in 2008, to construct and operate a read morerecently national cement mills ltd published a job circular. bangladesh citizen can be applied to this job circular. So if you built your career national cement mills ltd can apply for this job. We will be given this jobs all updated information here. recently devki steel mills ltd devki group Of companies. national cement company ltd. national cement company limited, a member of the devki group Of companies was formed in 2008, to construct and operate a portland cement plant in the heart of athi river..
national cement mill ltd collinefrbe national cement mills limited bangladesh kraftwelleu annual report 2017 of meghna cement mills limited it is a broadly described annual report of meghna cement mills limited in the year of 2017 in the financial year the contributions of this company to the national exchequer was taka 10797. read morenational cement mills limited national cement mills limited was recently taken over by premier cement as its 40% holding associate company. It was incorporated on september 1996 as a public limited company with a registered office in chittagong and a factory at issa nagar, karnafully, having a production capacity of 420,000 MTsimba is cement is under the devki group of companies owned by the renowned billionaire narendra raval popularly known as guru. devki group also owns the devki steel and maisha mabati. devki steel mills limited is the largest steel manufacturer in kenya with plants in ruiru, athi river and mombasa.
allied mills ltd knottingley west yorkshire km mills amp millers kings mill forge hill lane, wf hr knottingley, west yorkshire telephone ramraj agro mills limited company directors and apr ramraj agro mills limited is a public incorporated on may it is classified as nongovt company and is registered at registrar of companies, chennai its evaluations of national cement mills ltd: To evaluate this company please login or register statistics: times viewed: times listed keywords:mukesh ambani is the chairman and managing director of aman industries ltd. He joined aman in 1981, and initiated the companys backward integration journey from textiles to polyester fibres, petrochemicals and petroleum refining, and finally, upstream into oil and gas exploration and production.
mohammed amirul haque is a businessperson who has been at the head of different companies and currently is chairman of premier power generation ltd chairman for prime shrimp hatchery ltd chairman at secom shipping lines ltd chairman for aryan stevedore ltd managing director at transchart navigation ltd managing director at national cement mills ltd managing director & mohammad mustafa haider is chairman at premier cement mills ltd. see mohammad mustafa haiders compensation, career history, education, & memberships.national cement mills limited is located in chittagong, bangladesh. company is working in construction business activities. visit our company website for more information about us working hours.


Qingdao companies are experiencing an unprecedented transformation in materials – the fundamental of development in textile and garment industry.
Innovative materials have flourished in recent years as the industry kept moving forward, including seaweed fiber, chitin fiber, multicomponent fiber, and batik fabrics.
The batik fabrics produced in Qingdao have taken up a 30 percent market share globally. One national and 12 provincial research centers have set up in the city for facilitating progress in the industry.
Hongni Group produces underwear made of seaweed fiber. Its general manager Chen Qiang said that in comparison to cotton for underwear material, seaweed fiber is inflaming retarding, moisturizing, and has antibacterial effect. And there is an unending supply of the resource.
To provide an alternative to traditional fibers, Hongni collaborated with Qingdao University in the past 10 more years and discovered technical solutions to the industrialization production and automated production of seaweed fiber.
Jasfeel Co, headquartered in Jimo district, developed chitosan fiber from the fibers growing on legs of Alaska snow crabs. This new material has great bioactivity and biocompatibility, and the cloth made of it blended with cotton or modal fiber is antistatic, antibacterial, and has whitening and moisturizing effects. The development of the new fiber paved the way for the company to enter the medical textile area.
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US 5193383 A
A method and apparatus to use an Atomic Force Microscope to take measurements of surface forces, indentation, adhesion and mechanical properties such as hardness and elasticity. The force between a probe mounted cantilever and a sample is measured as a function cantilever deflection measured by a electron tunneling microscope. The sample and the tip of the tunneling microscope are each mounted on piezoelectric manipulators which provide for position control. Position of the sample and probe are measured from the voltages applied to the piezoelectric manipulators. Penetration is determined by the relative motion between the probe and sample. Presently, this invention has a force resolution of 1 nN and a depth resolution of 0.02 nm.
1. A method for using an Atomic Force Microscope (AFM) to measure a surface property of a sample, comprising:
mounting a probe for said AFM on a Cantilever whose deflection is a function of the force applied to said probe;
placing said probe and said sample at a separation greater than the zero deflection range of said surface property to be measured;
reducing said separation to zero by moving said sample towards said probe;
using a deflection measuring means to measure said deflection of said cantilever as a function of the position of said sample; and
determining said surface property of said sample from said displacement.
2. The method of claim 1 wherein said deflection measuring means is electron tunneling.
3. The method of claim 1 wherein said deflection measuring means is an optical means.
4. The method of claim 1 wherein said deflection measuring means is a capacitance measuring means.
5. A method as in claim 1 wherein said measurement of a surface property, comprises the steps of;
reversing the direction of travel of said sample until contact with said probe is broken;
determining surface force at each of a plurality of separations between the point of contact and the zero deflation separation from the measured deflection at that separation; and
recording surface force versus said separation.
6. A method as in claim 1 wherein said determining step comprises the steps of;
determining the penetration of the probe into the sample from the relative motion of the probe and the sample;
reversing the direction of travel of the sample until contact with the probe is broken;
determining the applied force by applying the deflection function to the measured deflection; and
recording the penetration versus the applied force.
1. Field of the Invention
This invention is in the field of measuring the surface forces and mechanical properties of materials; and, specifically, to measurements where nanoNewton (nN) forces, and less than nanometer (nm) distances must be resolved. Forces range from 10-3 to 10-9 Newtons and distances range from 10-6 to 10-10 meters. In addition to surface imaging, instruments of this type can be used to measure surface and mechanical properties of solid materials and the data from these surface measurements may be used to determine properties of materials such as hardness, elasticity, adhesion, surface tension, surface energy, and surface forces such as Van der Waals forces.
b 2. The Prior Art
This invention combines the capabilities of three different prior art instruments: the surface force apparatus, the hardness tester or indenter, and the atomic force microscope.
The surface force apparatus is used to study surface forces and adhesion. It consists of two crossed mica cylinders with radii of curvature on the order of 1 cm. One cylinder is in a fixed position; the other cylinder is suspended on a cantilever. The relative position of the cylinders, and thus the cantilever deflection, is determined by multi-beam interferometry. Using Hooke's Law (F=-kz), the interaction force between the cylinders is determined from the cantilever deflection times its effective spring constant. The surface force may be studied as a function of the distance between the cylinders. This technique is capable of measuring the separation of two surfaces to 0.2 nm but its lateral resolution is poor due to a contact area on the order of 10-30 μm2. The force resolution, typically 10 nN, depends on the effective spring constant of the cantilever.
The hardness tester (also called a micro or nano indenter, materials tester, or mechanical properties microprobe) generates curves of force versus penetration depth. Mechanical properties of materials, such as elasticity and hardness, may be determined from the loading curves. After the indenter contacts the sample, the load (force) applied to the indenter tip causes the tip to penetrate into the sample surface. The applied load is plotted as a function of the penetration depth. Penetration depth resolution is as high as 0.4 nm. Force resolution with commercially available instruments is currently 300 nN; however, 100 nN. For comparison, this invention offers a force resolution of 1 nN and a depth resolution of 0.02 nm.
The atomic force microscope is used to image the surface of a sample with nanometer spatial resolution. As the sample moves under a probe mounted on a cantilever beam, the deflection of the beam determines the applied force. Beam deflection is measured by an electron tunneling microscope, optical measurements, or capacitance measurements. Plotting the cantilever deflection as a function of the sample's x and y position generates a nanometer-scale image. In the past, the atomic force microscope was used only for imaging.
This invention uses an atomic force microscope as a surface force apparatus and a hardness tester. When used as instructed in this specification, an atomic force microscope is not only capable of providing nanometer-scale images of a surface, but also of measuring surface forces, mechanical, and adhesive properties of materials with a force, penetration depth, and spatial resolution superior to all other devices previously used. This differs from the atomic force microscope of the prior art because it provides for the measurement of surface deformations or surface positions as a function of the probe force exerted on a sample. It differs from the surface force apparatus in that it has high spatial resolution; it differs from the hardness tester in that it has much higher resolution of force and penetration depth, and in that it can image and measure surface forces and adhesion. In this invention, surface and materials properties are studied when the tip of a probe mounted onto a cantilever beam is brought close to and put into contact with the sample. The interaction of the probe and a sample surface can be used to measure (1) the elastic and plastic behavior and hardness of the sample by the indentation of the surface with a probe, (2) the long and short range forces (for example, Van der Walls, hydration, capillary, electrostatic, magnetic and capacitance forces) above the sample by positioning the probe tip 0.2-20 nm above the sample but not in contact with the sample, and (3) the adhesive forces, deformation mechanism, and fracture mechanics resulting from contact between the probe tip and sample during probe indentation and subsequent probe-sample separation.
In this invention, the instrument is configured to measure the force between a probe tip mounted on a cantilever beam and a point on a sample surface as a function of the sample to probe tip separation. This configuration allows studies of both the nano-mechanical properties of a sample and the forces associated with the probe tip-surface interaction.
These advantages result from the use of piezoelectric ceramics to accurately control the relative positions of the instrument's major components, the use of a flexible cantilever beam to accurately determine probe forces as a function of very small changes in displacement, and the use of electron tunneling to sense changes in the cantilever beam position.
Additional advantages and features will become apparent as the subject invention becomes better understood by reference to the following detailed description when considered in conjunction with the accompanying drawings.
FIG. 1 is a schematic representation of the surface force measuring instrument of this invention.
FIG. 2 is an exploded view of the tunneling microscope tip, the cantilever beam, the probe and sample assembly.
FIG. 3 is a schematic representation of a surface force measuring apparatus of this invention.
FIG. 1 is a schematic representation of the surface force sensor and indentation probe 20 of this invention. The left side shows the electron tunneling microscope or tunneling tip piezoelectric ceramic tube or tunneling tip piezoelectric manipulator 22 used to measure the deflection of probe 24 mounted in the center of a cantilever beam 36. The right side of FIG. 1 shows the sample stage comprising, sample holder 28 to which sample 26 attaches, coarse approach mechanism 30, and piezoelectric tube manipulator 32 which controls the x, y, and z motion of the sample. FIG. 2 is a schematic representation of the relationship among tunneling tip piezoelectric manipulator 22, probe 24, probe tip 34, sample 26, and sample piezoelectric manipulator 32.
Piezoelectric manipulator 22, 32 have electrodes to control the tube dimensions. The inside surface is covered by one electrode. The outer surface is divided among four equal areas along the major axis or the manipulator; each area is covered by one electrode. Piezoelectric manipulators 22, 32 change dimension when a voltage is applied across pairs of electrodes. This invention uses the manipulator's dimensional response to voltage to control the instrument movements. The voltages applied to manipulators 22, 32 are used to measure position and displacement within the instrument.
Cantilever beam 36 is made from small diameter tungsten wire. Probe 24 is made from thicker tungsten wire which is electrochemically etched to a small tip 34. The surface of probe 24 closest to tunneling tip 38 is coated with a thin layer of gold to resist oxidation thus preventing noise in the tunnel current. The force acting between probe tip 34 and sample 26 can be determined by measuring the displacement of cantilever beam 36. The separation between probe tip 34 and sample surface 26 is changed when sample piezoelectric drive circuit 39 (FIG. 3) changes the applied voltage thus causing the sample to move along the z axis. Displacement of cantilever 36 is measured by electron tunneling between the backside of probe 24 and electron tunneling tip 38. Electrons will tunnel across the gap between tip 38 and probe 24 when the two surfaces are less than 1 nm apart and a bias potential is applied. In FIG. 3, feedback control circuit 44 maintains a constant electron tunneling current 40 between tunneling tip 38 and cantilever beam 36. If an attractive force between probe tip 34 and sample surface 26 moves cantilever beam 36 towards sample 26, then the gap between the tunneling tip 38 and cantilever beam 36 will widen causing tunneling current 40 to decrease. Feedback control circuit 44 senses the change in current and changes the voltage applied to tunneling tip piezoelectric manipulator 22. This moves tunneling tip 38 closer to cantilever beam 36 re-establishing the constant electron tunneling current. Because feedback circuit 44 maintains a constant tunneling gap, and the distance the tunneling tip piezoelectric manipulator 22 moves is a function of the change in the voltage applied to ceramic 22, the change in applied voltage is a measure of the displacement of the cantilever beam 36.
Probe tip 34 and cantilever 36 may be constructed from different materials and with different geometries. The parallel structure shown for cantilever 36 constrains the motion of probe 24 to the z axis. The force laws governing the interaction between tip 34 and sample 26 are dependent on the tip geometry and on the interacting materials in tip 34 and sample 26.
Cantilever beam 36 may be made from various thicknesses or lengths of wire, configured in different ways. The effective spring constant of the cantilever beam may be altered by changing the wire's length, diameter, or configuration. The cantilever can also be micro-fabricated, using silicon etching or similar techniques. The cantilever may be mounted on a piezoelectric ceramic to control its position more precisely or to vibrate the cantilever at or near its resonance frequency in order to improve the sensitivity of force measurement.
Tunneling is the detection method shown in the preferred embodiment. However, other sufficiently sensitive means of detection include capacitance detection and optical means such as interferometry, optical position detection, and laser diodes.
In the preceding description piezoelectric manipulators 22, 32 are only subjected to direct current voltages. Alternatively, a small current oscillation may be applied to the z axis of one of the piezoelectric manipulators 22, 32 causing the data to be modulated by the applied frequency. This modulation detection scheme should reduce thermal drift problems.
An important advantage of this invention is that its improved force sensitivity and resolution allows surface measurements of any material, solid or liquid. Because the sample is not in the tunnel current conducting path, measurements can be made on insulating or conductive materials.
The device in FIG. 3 is capable of three different measurements: (1) surface force measurements, (2) indentation measurements, and (3) surface imaging. All of these measurements use active control of the z axis of the tunnel piezoelectric ceramic.
When surface force measurements are to be made, computer 45 provides a ramp signal causing piezoelectric drive 39 to apply a ramp voltage to the z axis of piezoelectric ceramic 32. The increasing voltage applied to its z axis causes the length of manipulator 32 to change, thus moving sample 26 towards cantilever 36 until probe tip 34 touches sample 26. The force on probe tip 38 is a known function of the deflection of beam 36. As their separation decreases, probe tip 34 is attracted to the surface of sample 26. Deflection of beam 36 is evidenced by the change in the voltage applied to tunneling piezoelectric manipulator 22. After contact, probe tip 34 is moved in the opposite direction, that is towards tunnel tip 38, by the continued travel of sample 26. Adhesive forces are computed from the deflection of beam 36 required to break contact as sample 26 is withdrawn.
Indentation measurements are made using the same procedure used in the surface force measurement. After probe 24 and sample surface 26 contact, the depth that probe tip 34 penetrates into sample 26 is then computed from the difference in movement of sample 26 and probe tip 34. These movements are known as a function of the change in voltages applied to piezoelectric manipulator 22, 32.
The force acting between probe tip 34 and sample 26 can be determined by measuring the displacement of cantilever beam 36. The separation between probe tip 34 and sample surface 26 is changed when sample piezoelectric drive circuit 39 (FIG. 3) changes the applied voltage thus causing the sample to move along the z axis. Displacement of cantilever 36 is measured by electron tunneling between the backside of probe 24 and electron tunneling tip 38. Electrons will tunnel across the gap between tip 38 and probe 24 when the two surfaces are less than 1nm apart and a bias potential is applied. In FIG. 3, feedback control circuit 44 maintains a constant electron tunneling current 40 between tunneling tip 38 and cantilever beam 36. If an attractive force between the probe tip 34 and sample surface 26 moves cantilever beam 36 towards sample 26, then the gap between the tunneling tip 38 and cantilever beam 36 will widen causing tunneling current 40 to decrease. Feedback control circuit 44 senses the change in current and changes the voltage applied to tunneling tip piezoelectric manipulator 22. This moves tunneling tip 38 closer to cantilever beam 36 reestablishing the constant electron tunneling current. Because feedback circuit 44 maintains a constant tunneling gap, the distance the tunneling tip piezoelectric manipulator 22 moves is a function of the change in the voltage applied to manipulator 22, the change in applied voltage is a measure of the displacement of the cantilever beam 36.
The x-y translation of the sample allows multiple tests to be performed on each sample surface.
When used in the traditional imaging mode, the sample is moved in the x and y directions while the cantilever position is measured by the voltage applied to piezoelectric manipulator 22. Current 40, It, is held constant, as explained above, by controlling the position of tunneling tip 38. As the tunneling current 40 is held constant, the tunneling distance is held constant. The required change in z axis voltage applied to piezoelectric rides on the surface of sample 26. Cantilever motion is plotted against the sample's x-y position to generate a nanometer-scale image of the sample surface.
Experimental surface force and indentation measurements of different surfaces, including monolayer films, are reported in MEASURING THE NANOMECHANICAL PROPERTIES AND SURFACE FORCES OF MATERIALS USING AN ATOMIC FORCE MICROSCOPE, N. Burnham and R. Colton; J. Vac. Sci. Technol., A7 (4), page 2906, Jul/Aug 1989; and PROBING THE SURFACE FORCES OF MONOLAYER FILMS WITH AN ATOMIC-FORCE MICROSCOPE, N. Burnham, D. Dominguez, R. Mowery, and R. Colton; Physical Review Letters, Volume 64, Number 16, page 1931, Apri. 16, 1990.
Although the best mode of the invention has been described, it should be understood that changes and deletions in the detail can be made without departing from the spirit and scope of this invention.


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