Tungsten Powder Preparation by Ammonium Paratungstate Hydrogen Reduction Advantages

Compared to the traditional preparing method, tungsten powder prepared by ammonium paratungstate hydrogen reduction has higher property and green strength. Tungsten powder prepared by this method has uneven particle size and incompletion of crystal. Because of these characters, tungsten powder has greater shaping property and green strength.

Traditional tungsten powder is formed without binder which has low formability. When the pressing pressure is low, the binding strength of powder is insufficient and it is very fragile. It will crack if the pressure rises and cause hierarchy. However tungsten powder prepared by hydrogen reduction under 300MPa, there is no hierarchy and green strength reaches above 2MPa.

Tungsten powder prepared by ammonium paratungstate hydrogen reduction is of irregular shape, during the pressing process, the corner of powder contacts with corner unlike traditional surface contact with surface. The formability thus increases.



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