How to Reducing the Average Particle Size of Ammonium Paratungstate Powders?

A process for reducing the average particle size of an ammonium paratungstate powder having the steps of heating the ammonium paratungstate powder at a temperature of between about 110° C. to about 205° C. For a time sufficient to reduce the average particle size of the ammonium paratungstate powder by at least 20 percent. The average particle size of the obtained tungsten powders is 67μm,the maximum particle size is 150μm,the biggest loose density is 13.41 g·cm~(-3),and the best powder flowability is 9 s for 50 g tungsten powders.

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