Tungsten Oxide Composition Effect on Ultrafine Tungsten Powder

Tungsten oxide,  WO3, is a chemical compound containing oxygen and the transition metal tungsten. It is obtained as an intermediate in the recovery of tungsten from its minerals.Tungsten ores are treated with alkalis to produce WO3. Further reaction with carbon or hydrogen gas reduces tungsten trioxide to the pure metal.

The effect of phase composition o f tungsten oxide on the homogeneity of ultrafine tungsten powder has been studied using a conventional hydrogen reduction technique. The results show that ultrafine and homogeneous tungsten powder can be produced from sing le-phase tungsten oxide. The tungsten powder made by multi-phase oxides may be fine , but not homogenous due to differences between the reduction rates ( or reduction paths) of various oxides.

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