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Ultrafine Tungsten Carbide Powder 427

Ultrafine tungsten carbide powder is tungsten carbide powder with particle size ≤0.5μm. It is the basic raw material for the production of ultrafine-grained tungsten carbide. It should be sealed in vacuum and cannot be stored for more than 8 months. Particle The particle size of the ultrafine tungsten carbide powder can be measured by using the microscope (SEM, TEM), the laser particle size method, the X-ray line width method and the specific surface area method. The combination of several measurement…

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Ti Doped Violet Tungsten Oxide 389

Ti doped violet tungsten oxide refers to the crystal lattice of VTO doped Ti (titanium atoms) to form a new type of crystal lattice. Ti doped W18O49 nanowire has good sensitivity and selectivity to NO2 gas. NO2 adsorbs on the surface of the tungsten oxide nanowire as an electron acceptor. It captures electrons from the conduction band of nanowire, resulting in a decrease in conductivity of the nanowire and a gas-sensitive response. Compared with W18O49 nanowire (pure phase), there are…

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Mo Doped Violet Tungsten Oxide 400

Mo doped violet tungsten oxide, or Mo-W18O49, can be synthesized by hydrothermal method. The Mo-W18O49 can be applied as the catalyst in manufacturing hydrogen with a very high activity. Why does molybdenum doping can increase the hydrogen activity of Mo-W18O49? After doping Mo, violet tungsten oxide, as a catalyst, whose hydrogen production activity is improved because the doping of Mo increases the active sites of catalyst, since the approximate 3D microstructure composed of one-dimensional nanowire can not only help electronic…

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V-doped Violet Tungsten Oxide 405

V-doped violet tungsten oxide, or V doped violet tungsten oxide, is doping V (vanadium) into VTO (W18O49) nanowire lattice structure to generate doped W18O49 nanowire. Some studies indicate that V doped violet tungsten oxide can be directly synthesized by solvothermal method, using tungsten hexachloride (WCl6) as tungsten source and NH4VO3 as dopant. Studies have shown that the gas sensor made of V-doped tungsten oxide nanowire has obvious sensitive response at room temperature and good stability response to the nitrogen dioxide…

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Doped Violet Tungsten Oxide 383

Doped violet tungsten oxide (VTO, W18O49) is the VTO product obtained by doping modification with a better property, like gas sensitive, catalyzing and others. Studies have indicated that doping is the excellent method to modify W18O49. The common seen doped violet tungsten oxides are V-doped violet tungsten oxide, Mo doped violet tungsten oxide and Ti doped violet tungsten oxide. They show their own unique properties as the doping elements are different. Here are a few examples, as listed below: 1.…

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Doping Blue Tungsten Oxide 386

Doping blue tungsten oxide, or doped blue tungsten oxide, is the β-tungsten oxide doped with small amounts of other elements to enhance its properties, such as K2O, SiO2, and Al2O3. The role of additives is the recombination action of Si-Al-K. Si-Al will promote the formation of β-W. K enters the lattice of W, under high temperature calcination, residue of K in tungsten rod will improve the non-sag performance of tungsten wire. Doping element changes the chemical component of blue tungsten…

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High Purity Blue Tungsten Oxide 355

In theory, high purity blue tungsten oxide (BTO) refers to the β-tungsten oxide with a very high purity of 99.99% and above. The quality of tungsten products is getting more and more attention with the constant rise of high and new technology. According to the tungsten products on the performance of genetic, high purity of blue tungsten oxide will directly contribute to the high purity requirements of downstream products. The industrial blue tungsten oxide mainly consists of several tungsten oxides…

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Doped Yellow Tungsten Oxide 427

Doped yellow tungsten oxide, also known as doped tungsten trioxide, is a good catalyst. Compared with the common yellow tungsten oxide, the photoelectric conversion efficiency and photoelectric catalytic activity of the doped tungsten trioxide have been improved. For example, Fe is doped to form Fe2O3 and Fe3+ can capture the photo electron, which inhibits the recombination of electron and hole. Doping is an important method. It can improve the efficiency of photoelectric conversion and the ability of photoelectric catalysis. Doped…

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Fine Tungsten Carbide Powder 433

Fine Tungsten carbide powder has high purity, uniform particle size and good dispersibility. It has the surface electronic properties of platinum, which can be used as a catalyst in some organic reactions. Preparation Use metal tungsten powder and carbon black as raw materials, mixture in a certain proportion, the mixture into graphite boat, placed on a carbon tube furnace or high sense of intermediate frequency electric furnace, carbonized under a certain temperature, then through ball mill, screening. Finally, fine tungsten…

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Tungsten Carbide Powder 429

The chemical formula of tungsten carbide powder is WC. It is a good electric conductor with stable chemical properties. It is suitable for machining at high temperature and is the main raw material for the production of cemented Carbide. Characteristic Tungsten carbide powder is a black hexagonal crystal, with metallic luster, similar hardness to diamond, good conductor for electricity and heat. Melting point is 2870 ℃, the boiling point is 6000 ℃, the relative density is 15.63 (18 ℃). The…

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