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Application of Nano Tungsten Trioxide in Gas Sensing Material 154

With the rapid development of industry, the overuse of oil, natural gas and other resources has caused serious pollution of air and environment. The manufacture of gas sensing material for detecting toxic and harmful gases has became a hot research spot. Nano tungsten trioxide used as gas sensing material can be divided into four structures。 （1）Nano tungsten trioxide gas sensing material with zero-dimensional structure The materials of zero-dimensional structure are mainly nanospheres, nanoparticles and quantum dots. Although the specific surface…

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Application of Nano Tungsten Trioxide in Photocatalytic Material 183

The following is to introduce how nano tungsten trioxide is photocatalyzed. Firstly, preparing for a nano tungsten trioxide, then text it photocatalytic properities of water cracking into oxygen and protons. Because the nano tungsten trioxide lack of quality of metals, ?it almost no catalysis. Secondly, adding a small amount of platinum and ruthenium dioxide into nano tungsten trioxide to improve its catalytic performance. And it turns out that the absorption band of nano tungsten trioxide becomes wider from narrow, the…

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Research on Nano Tungsten Powder Prepared by Purple Tungsten oxide 222

The hydrogen reduction technique of purple tungsten oxide(WO2.72), the formation mechanism of tungsten powder particles and its hydrogen reduction process conditions are analyzed, it is found that WO2.72 is the most suitable raw material for the preparation of nano tungsten powder. The nano tungsten powder is the fine tungsten powder with nanometer particle size, which is prepared by nanotechnology, test shows that the WO2.72 is most suitable raw material to prepare the tungsten powder. Domestic nanotechnology is far less mature…

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Ultrafine Tungsten Powder Produced by Blue Tungsten Oxide and Purple Tungsten Oxide 259

Ultrafine tungsten powder is the important raw material for producing fine grain cemented carbide, the raw materials for producing superfine tungsten powder consist purple tungsten oxide(purple tungsten) and blue tungsten oxide(blue tungsten). Blue tungsten oxide is most widely used raw material to produce tungsten powder by hydrogen reduction method. As long as the conditions are low temperature, dry hydrogen, high hydrogen flow and thin material layer, ultrafine tungsten powder is able to be produced by hydrogen reduction method. However, too…

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How to Improve W-Cu Alloy Property 241

Modern production enterprises pay close attention on the improvement of W-Cu alloy property. The alloy is composed of mixed W-Cu two-phase monomers, which is insoluble and not develop into intermetallic compound, so it is called typical pseudo alloy. Modern production enterprises want to get W-Cu composite with higher property and higher density, it is necessary to overcome the mutual insolubility of tungsten and copper, and combine the characteristics of tungsten-copper composite products to make compact pressure processing in order to…

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W-Cu Alloy Preparation Method 203

Now there are two kinds of W-Cu alloy preparation methods, which are traditional methods and modern methods. The alloy made by tungsten and copper with 10% ~ 50% copper content has good electrical and thermal conductivity, high temperature strength and plasticity to some degree. W-Cu alloy is widely used to manufacture high-temperature components including high-voltage electrical switch contacts resistant to erosion, rocket nozzle throat liner, tail rudder etc., and also used as electrodes for electrical machining, high-temperature mold and other…

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Tungsten Crucible Crack Analysis 203

The tungsten crucible crack analysis is quite important. If the problem that the bottom of crucible easily cracks is not solved, it will directly affect the yield of the crucible. Although powder metallurgy method producing crucible has many advantages including greatly saving metal consumption and reducing production cost, there are still many technical problems to be solved such as the bottom of crucible easily cracking. There are many kinds of preparation methods to produce crucible, powder metallurgy method is widely…

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Preparation Methods of Tungsten Crucible 237

What is tungsten crucible? It is made by turning and welding with tungsten rod, and produced from pure tungsten plate, tungsten sheet and pure tungsten rod according to relevant technology, many types of preparation methods are available. It has wide application in rare earth smelting, quartz glass, crystal growth and other industries, and plays an important role in modern industry. Six main preparation methods of tungsten crucible are available: 1.0 Isostatic pressing sintering method 2.0 Forging method 3.0 Chemical vapor…

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Toyota Solid-state Battery Will Be Released within the Year 183

Recently, Toyota Motor will launch a “disruptive” solid-state battery this year, which can provide 500 kilometers of battery life, can be charged from empty to full within 10 minutes, and has minimal safety hazards, so it is expected to become a water-based battery. A viable alternative to lithium-ion batteries with electrolyte solutions. At present, the power batteries carried by pure electric vehicles are mainly ternary lithium batteries and lithium iron phosphate batteries, but these two traditional lithium-ion batteries also have…

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Application of Cesium Tungsten Bronze 129

Cesium tungsten bronze is a typical compound of rare metal tungsten. Its chemical formula is CsxWO3. It has a crystal structure similar to that of tungsten bronze. It has a special oxygen octahedral structure. Therefore, it has excellent mechanical, optical and thermal properties and is widely used in medical, Film, glass, textile fiber and other fields. The following mainly introduces several major application of CsxWO3. The use of CsxWO3 in tumor diagnosis and treatment CsxWO3 ultra-fine particles are considered to…

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