Removal method of glass adhered to sintered object during isostatic pressing process.

摘要

Method of removing a layer of glass formed on a sintered body manufactured by hot isostatic pressing of a preformed body of inorganic powder such as silicon nitride powder, silicon carbide powder or the like with a pressure medium at a sintering temperature, wherein the sintered body of inorganic powder is retained in alkali solution at a high temperature for a predetermined time, preferably under a predetermined pressure.