Purple Tungsten Oxide Use

Purple tungsten oxide (VTO), also known as purple tungsten oxide (TVO). Purple tungsten oxide is produced in the partial ammonium tungstate calcination process, different manufacturers of different purple tungsten oxide content. It is not the sense of chemical compound, but by a different component composition, such as arsenic trioxide, tungsten copper, and a low content of tungsten trioxide. The relative content of these compounds depends on the tungsten oxide purple calcination parameters. Purple purple tungsten oxide is finely powdered crystals. It is the precise control of the temperature in the reducing conditions, the production of secondary acid generated during ammonia. Purple tungsten oxide is mainly used in the production of tungsten metal powder and tungsten carbide. Purple tungsten oxide can also be used to make ultra-fine tungsten powder and nano tungsten powder.

Morphology of the most special purple tungsten, loose particles in each group by a needle or rod-like particles composed of grains, grain structure of this great gap, tungsten powder generated when hydrogen nuclei to restore more, fast response, fine grain size, suitable for the production of fine particles of tungsten powder. With purple tungsten as raw materials in the reduction process without tungsten dioxide (WO2) generated intermediate stage, can be prepared from ultrafine or nano tungsten, tungsten carbide powder. Purple tungsten oxide itself has a unique form of fine needle-like crystals, which aggregate loose sponge-like, compared with the yellow tungsten and tungsten blue, purple tungsten oxide tungsten bulk density than the yellow, blue tungsten is much smaller, BET The minimum surface area, the chemical activity of the largest tungsten powder generated during hydrogen reduction fastest, most fine granularity, and purple tungsten oxide produced tungsten powder particle size and particle size distribution is quite stable. By Purple tungsten oxide W18O49 for raw materials tungsten powder, tungsten carbide powder with a small and easy to grow uniform characteristics. Purple tungsten oxide WO2 • 72 prepared by hydrogen reduction of tungsten powder fine and uniform dispersion of the particles between the good, is suitable for the preparation of an ultra-fine grain cemented carbide raw materials.

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