Yellow Tungsten Oxide

Tungsten trioxide is a thermally stable and water insoluble tungsten compound. Tungsten trioxide is used in the production of tungsten metal powders. Yellow tungsten trioxide is a finely divided, yellow, crystalline powder. It is produced by roasting ammonium paratungstate at closely controlled temperatures to drive off combined water and ammonia. Yellow tungsten oxide is commonly used in the manufacture of coarsertungsten carbide powders