BTO is the abbreviation of blue tungsten oxide, which refers to a type of dark blue powder containing tungsten (VI) and mixed valence of tungsten (V). In the industry, blue tungsten oxide refers to a mixture of WO2.72, WO2.90, W20O58 and (NH4) x•WO3.
BTO, which is mainly composed of ammonium tungsten bronze (ATB) and WO2.90, is a good raw material for the production of tungsten materials and an excellent raw material for tungsten-based tungsten carbide and other tungsten products.
Pyrogenic Process to Make Blue Tungsten Oxide
Pyrogenic process is a common method to produce blue tungsten oxide in industry.
Generally, it is made by adopting Ammonium paratungstate (APT) as raw material, through the thermal decomposition or reduction under hydrogen.
Also, blue tungsten oxide can be prepared through the reduction of tungsten trioxide. But, the quality is not as well as the condition when it adopts APT as raw material.
More details, please visit:
http://www.tungsten-powder.com/Blue-Tungsten-Oxide.html
