Blue tungsten oxide(BTO) is also called tungsten blue oxide (TBO). TBO is manufactured by calcination of APT under more or less reducing conditions which vary from producer to producer. It is not a chemically defined compound, but consists of various different constituents, like trioxide, tungsten bronzes and different lower tungsten oxides. The relative amount of these compounds in TBO depends on the calcination parameters.
Blue tungsten oxide is used primarily for the production of tungsten metal powder and tungsten carbide.
Blue tungsten oxide has been used to produce doping, tungsten rod, tungsten bar, tungsten wire and tungsten high density alloys.
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