What does APT stand for?

What does APT stand for?

In tungsten industry, APT is stand for ammonium paratungstate, whose chemical formula is 5(NH4)2O.12WO3.xH2O. APT is produced separating tungsten from its ore. APT is heated to its decomposition temperature, 600 °C. Left over is WO3, called tungsten trioxide. Tungsten oxide is heated in an atmosphere of hydrogen, reducing the tungsten to elemental powder--tungsten powder. The tungsten powder can be fused into any number of things, from wire to rods to other shapes.

Visiting www.tungsten-powder.com you could get more information.