Blue Tungsten Oxide Producing Tungsten Oxide Quality Requirement

The quality of blue tungsten oxide has some effect on producing fine tungsten powder, so in order to make more good quality and performance fine tungsten powder, choosing good quality blue tungsten oxide will be the important section.

Firstly, quality blue tungsten oxide are very strict at blue tungsten oxide impurity content, alkali metal, for example, impurities usually is oxygen carriers, and that will delay the oxygen residence time in the powder layer, enhanced chemical vapor migration process, thereby enhancing the tungsten powder particle size.

Secondary, the requirement of blue tungsten oxide particle size, different blue tungsten oxide  particle size at temperature of 800 ℃ through hydrogen the blue tungsten oxide particle size is no the same. The study found that coarse blue tungsten conducive to the production of fine tungsten powder, because coarse particles have good ventilation during reduction and it will help to rule out reducing water vapor.

Finally, the requirements of blue tungsten oxide volatiles, blue tungsten containing different amounts of residual volatiles NH4 and H2O, these volatiles will produce water which will make hydrogen more humidity when blue tungsten oxide reducing tungsten powder. And this is not good for producing fine tungsten powder.