Tungsten

Tungsten
Ultra-fine Integrated Circuit Board Micro Drill Made by Ultra-fine Grained Cemented Carbide 722

Integrated circuit board (PCB) is the key component of electronic information industry chain, as a key tool of PCB micro hole processing and printing, ultra-fine integrated circuit board micro drillcan only be made by ultra-fine grained cemented carbide. In the past, China could only produce micro drill with the diameter of 0.1 mm. After ten years we w canproduce ultra-fine micro drill with the diameter of only 0.01 mm, which is the finest drill in the world. With the rapid…

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Needle-shaped Purple Tungsten Oxide for Energy Saving Film 198

As a typical oxide of non-ferrous metal tungsten, needle-shaped purple tungsten oxide particles are also finely divided purple tungsten oxide powder crystals. Because of their excellent physical and chemical properties, they are popular in many fields. In addition to being an important raw material for tungsten products such as metal tungsten powder and tungsten carbide powder, purple tungsten oxide is also an important additive for products such as energy storage electrodes, photocatalysts, shielding materials, resistance components, dimming glass and energy-saving…

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Research on the Microstructure of Tungsten Oxide 289

With the continuous development of the tungsten product industry, manufacturers have increasingly higher requirements for their quality and performance. As one of the important raw materials for tungsten products, the chemical purity, fluidity, bulk density, FSSS particle size, specific surface area and other properties of tungsten oxide will greatly affect the performance of tungsten products. Therefore, it is necessary to study the microstructure of tungsten oxides. All tungsten oxides are made from APT (ammonium paratungstate) and calcined. Due to the…

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Tungsten Oxide for High Temperature Resistant Lithium Battery Cathode 219

As for the new type of high temperature lithium battery cathode material, the reason why tungsten oxide ultrafine powder is selected as the key modifier is that the powder can greatly improve the heat resistance and chemical stability of electrode products. Cathode material is one of the key materials that determine battery performance, and it is also the main source of lithium ions in current commercial lithium-ion batteries, and its performance and price have a greater impact on the product.…

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Cemented Carbide Production Process 206

The production process of cemented carbide includes three processes of mixture preparation, forming and sintering. In order to make the alloy have higher strength and hardness, producers often dope the bonding metal into the carbide in fine powder form, add other elements if necessary, and then ball mill these materials for a certain period of time to make it becomes a homogeneous and granular mixture with complex requirements. Note: Grinding is usually carried out in organic solvents such as alcohol…

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Application of Molybdenum in Medicine Field – Molybdenum Target 246

Molybdenum (Mo) and molybdenum alloy materials have wide applications?in the manufacturing industry, aerospace industry, steel smelting, petrochemical industry, medical devices, national defense construction and other industrial fields.?In?the field of medicine,?the most widely known and closely relevant to our lives is molybdenum target. Mammography is to take pictures of breast tissue to achieve the purpose of diagnosis by using soft X-ray, the structure mainly includes X-ray tube, high-voltage generator, rack/mechanism, compression plate, image processing device(or cassette), puncture biopsy system, image post-processing…

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Preparation of Large-size Tungsten-Based Heavy Alloy 209

Large-size tungsten-based heavy alloy has a series of advantages including?high density, low coefficient of thermal expansion, good oxidation resistance and corrosion resistance,?etc.?In fields of aerospace, electronic information and so on, large-size and high performance tungsten-based heavy alloy is in urgent need. Find the rule of?internal structure of large-size tungsten based high specific gravity alloy?during liquid phase sintering process?to obtain?high homogeneity, high performance and parts of large-size tungsten based high specific gravity alloy. After analyzing the composition, sintering process, material property,…

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Metal Injection Molding of High Density Tungsten Alloy 224

The cost of traditional high?density?tungsten?alloy is high, as 3C industry begins to use small-size high density W-alloy part?as counterweight material,?higher requirement is?put forward for the forming technology of high density W-alloy. Therefore metal powder injection molding (MIM)?technology appears, it?is a new near net forming technology for part, which combines plastic injection molding technology with powder metallurgy technology, it can?effectively promote the wide use of high density W-alloy materials in 3C and other high-tech industries. The metal injection molding of high…

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Fracture Failure of High Density Tungsten Alloy 198

High density tungsten alloy has excellent mechanical property, anti burning property and absorption ability to radiation. Therefore, it is used in explosive parts such as armor piercing bomb. Normally, the part should keep well after impacted by the front end explosion, but in the test, the component breaks without external force. In order to?make analysis of the failed component’s fracture failure, the fractured explosive component?and different batch of standard components meeting the requirements?are?compared and analyzed to confirm?the failure reason of…

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Ammonium Metatungstate for Petroleum Catalyst 179

Ammonium metatungstate is the main raw material of tungsten-based catalyst, which can greatly improve the catalytic performance of the prepared product. In recent years, with the development of petroleum refining and petrochemical industries, the amount of tungsten compounds has also increased. Ammonium metatungstate is an inorganic compound with a chemical formula of H28N6O41W12, a molecular weight of 2974.32, with white or light yellow color, the purity is up to 99.95%, and main content of WO3 is up to 83.0%. It…

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