High Purity Violet Tungsten Oxide

Violet tungsten oxide is short for VTO, is named by its violet appearance. It is a widely recognized best raw material for producing ultra fine or nano tungsten powder in the industry. Violet tungsten oxide is mainly used in producing tungsten metal powder and tungsten carbide powder, as well as gas sensing material.

High purity violet tungsten oxide (WO2.72 or W18O49) has low impurity content and high purity content, it can usually reach 99.95%(3.5N), 99.99%(4N). If producing condition and raw material are well controlled, the purity can even reach 99.9995%, which is 5N.

To obtain high purity tungsten material, factory should maintain clean in the producing process to reduce impurity in product. Factory is usually being spray dried. So we usually use APT with low U and Th content for these two elements has a-ray. It will cause soft error in memory circuit. APT can be crystallized for several times to eliminate other impurities and turns into high purity APT, then used to calcine high purity VTO.

Use high purity VTO to reduce high purity tungsten powder or tungsten carbide powder is to realize high property and quality of tungsten carbide products. With increase of material purity, potential property of many raw material is activated. Sandvik, the leading producer of tungsten carbide products, has a big need for high purity tungsten powder. Besides that, it also has wide application in electronic industry such as electronic pipe, vacuum pipe electrode and new energy catalyst. And VTO is the best raw material for high purity tungsten powder both in low cost and high quality.

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