Aqueous slurry for making a powder of hard material

摘要

An aqueous slurry that is useful upon being spray dried for the formation of a powder of hard material. The aqueous slurry includes starting powder components of the hard material. The slurry further includes an oxidation inhibitor, a surfactant in an amount between about 0.05 weight percent and about 0.30 weight percent of the weight of the starting powder components of the hard material, a binder, a defoamer and water in an between about 15 weight percent and about 30 weight percent of the weight of the weight of the starting powder components of the hard material. The aqueous slurry has a percent solids value that is between about 70 percent and about 85 percent.

主权项

1. An aqueous slurry useful upon being spray dried for the formation of a powder of hard material, the aqueous slurry comprising:
starting powder components of the hard material; an oxidation inhibitor in an amount between about 0.2 weight percent and about 0.5 weight percent based on weight of the starting powder components of the hard material; a surfactant in an amount between about 0.05 weight percent and about 0.30 weight percent of the weight of the starting powder components of the hard material; a binder in an amount between about 1.2 weight percent and about 4.0 weight percent of the weight of the starting powder components of the hard material; a defoamer in an amount between about 0.05 weight percent and about 0.35 weight percent of the weight of the starting powder components of the hard material; and water in an amount between about 15 weight percent and about 30 weight percent of the weight of the starting powder components of the hard material; and the aqueous slurry having a percent solids between about 70 percent and about 85 percent wherein the percent solids comprises a quotient in percent of the weight of the starting powder components of the hard material divided by the sum of the weight of the starting powder components of the hard material and the weight of the water.