Method for refining non-oxide ceramic powders.

摘要

A method for refining powders comprising the steps of: (a) adding fluororesin powders to non-oxide ceramic powders to form a mixture by mixing; and (b) heating the mixture in non-oxidizing atmosphere to allow oxides existing on the surface of the non-oxide ceramic powders to convert into gaseous fluorides, the gaseous fluorides being removed. The fluororesin is polytetrafluoroethylene resins. The heating temperature in the non-oxidizing atmosphere is 500 DEG C to 1300 DEG C.