Blue Tungsten Oxide Process

Currently, Blue tungsten carbide powder production of raw materials is the most widely used in mu tungsten carbide, it is used as an important raw material producing tungsten powder. Its performance has been more emphasis on the production and using by the manufacturers. It refers to a class of compounds containing a dark blue tungsten and tungsten mixed valence state. It is generally formed in the solution. Under normal circumstances, there are two blue tungsten producing: Fire method and wet method. Fire is a common method in the industrially produced. Generally manufacture's using APT (APT acid) as raw material by weak hydrogen reduction making blue tungsten oxide, it maintains pseudomorphic shape of the raw material APT. It also can restore WO3 obtained it by hydrogen mild, but the quality of it are not better than using APT as raw materials. The second method is a wet method, wet is a new method evolved through research. Reduction of ammonium tungstate solution can be prepared by hydrogen 3.5 (NH4) 2O • 5WO2 • 13WO3 • 4.5H2O blue tungsten. Hydrogen reduction of tungsten solvent organic phase may also take tungsten obtained O: W = 2.82 blue tungsten. To restore the rule of law in the main phase WO2.90 blue tungsten.

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