
Violet tungsten oxide powder may be used to produce nano-ceramic dispersion solution for applying in building heat insulation film or car film. Violet tungsten oxide (W18O49/WO2.72) is one of tungsten oxides. The other three kinds of tungsten oxides are yellow tungsten oxide (WO3), blue tungsten oxide (W20O58/WO2.90) and tungsten dioxide (WO2). All of the above four kinds of tungsten oxides can be used as raw materials for the production of tungsten powder. As early as the 1950s, tungsten acid and…