Process for preparing a silicon nitride powder mixture.

摘要

A process for preparing a silicon nitride powder mixture with at least one metal oxide, which comprises mixing silicon nitride powder with a solution containing at least one nitrate of metal selected from the group consisting of metals of Groups IIA, IIB, IIIA, IIIB and IVA of the Periodic Table, then evaporating the solvent of said solution to dry the mixture, and baking the dried mixture to convert the metal nitrate to the corresponding metal oxide.