[Know Tungsten] Intermediates of Tungsten

Intermediates of tungsten include ammonium paratungstate, tungsten metal powder, and tungsten carbide, cast carbide.

Ammonium Paratungstate

APT [(NH4)10[H2W12O42] • 4 H2O] is the main intermediate and also the main tungsten raw material traded in the market. APT is usually calcined to yellow (WO3) or blue oxide (WO3-X; a slightly substoichimetric trioxide with varying oxygen content). 

 

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