Blue Tungsten Oxide, Tungsten Powder, Tungsten Carbide Powder

Industrial blue tungsten oxide blue tungsten oxide is a powder mixture by a variety of tungsten compounds. Money is generally made of tungsten bronze, hydrogen tungsten bronze, tungsten trioxide, B-oxide (WO2.9) and y- tungsten oxide (WO2.272) mixing the composition, its apparent color when the oxygen index (O/W) from 2.27 to 3.0 continuous change to yellow and purple. It is gradually replacing the traditional yellow WO3 tungstate and tungsten become an important intermediate compounds. Blue tungsten oxide production, the industry is generally used four muffle furnace and rotary tube furnace under a protective atmosphere or confined conditions, ammonium paratungstate generate blue tungsten oxide to 060 ~ 90C temperature calcination.

Tungsten powder particle size is obtained by reduction 3 ~ 03um. Its color varies with the thickness of the particle size, the finer the powder particles, the darker the color. Coarse-grained tungsten powder is gray and has a metallic luster highlights; grayish black medium-grained tungsten powder; ultrafine tungsten powder dark black. Surfactant fine tungsten powder particles is large, exposed to the air it is easy to absorb moisture and surface oxidation. Ultrafine particles of tungsten powder needle without purification apt "spontaneous combustion" phenomenon jacket into tungsten trioxide produced tungsten metal powder reduction method using blue (yellow) color made of tungsten oxide, tungsten powder. Industrial value of the metal tungsten powder reduction method has four kinds: carbon reduction, carbon-containing gas reduction, decomposition of ammonia reduction and hydrogen reduction method, the most widely used method for hydrogen reduction.

Tungsten carbide powder and carbon can form two carbide, tungsten carbide that (WC) and two tungsten carbide (W2C). Tungsten carbide powder is one of the main raw material of cemented carbide, which is a high melting point, high hardness of the refractory metal carbide powder. Color with refined grains and deepened, fine particles of tungsten carbide powder was black. Production of tungsten carbide powder, tungsten carbide powder is a refractory metal carbide powder, its production in many ways, the value of industrial solid carbon carbonization, carbon-containing gas carbonation, casting carbonization, wider application of solid carbon carbonized method.

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