Using Purple Tungsten Oxide as Raw Material

Purple tungsten oxide (Violet Tungsten Oxide, VTO), referred to as purple tungsten. Purple tungsten oxide refers to paratungstate (Ammonium Paratungstate, APT) as raw materials under certain conditions Calcination, decomposition, reduction generated purple tungsten oxide. General purple or blue-purple crystalline powder. By strong fissile octahedral structure, intrinsic crystalline needle and rod. Purple Tungsten is a tungsten oxide, the chemical formula for WO2.72 or W18O49. Purple and yellow tungsten oxide, tungsten (the yellow tungsten WO3), blue tungsten oxide (referred to as blue tungsten W20O58 or WO2.90) and brown tungsten oxide (WO2) collectively known as tungsten oxide. The tungsten oxide can be used as raw material for the production of tungsten powder, tungsten because of its unique nature purple to purple tungsten tungsten powder products as raw materials, has generated fast, fine-grained and so on.

Ultrafine cemented carbide demonstrates a superior combination of higher wear resistance and higher hardness. The key factor to obtain ultra- fine carbides with pure, fine and homogeneous grain is using finer starting tungsten carbide powder with tight particle size distribution. Two kinds of ultra- fine carbides were synthesized by adopting blue and purple tungsten oxides as rawmaterials respectively. And, after contrasting the properties of the two kinds of alloy,it was concluded that the alloy using purple tungsten oxide as raw material has better over- all properties with smaller grain size, higher strength and hardness.

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