METHOD FOR PRODUCING SILICA FILM-FITTED SILICON CARBIDE RAW MATERIAL, SILICA FILM-FITTED SILICON CARBIDE RAW MATERIAL, METHOD FOR PRODUCING SILICON CARBIDE SINTERED COMPACT, AND SILICON CARBIDE SINTERED COMPACT

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a silica film-fitted silicon carbide raw material capable of obtaining a silicon carbide sintered compact by reducing the occupation ratio of free carbon after sintering, a silica film-fitted silicon carbide raw material, a method for producing a silicon carbide sintered carbide, and a silicon carbide sintered compact.;SOLUTION: Silicon carbide powder Pp in which the occupation ratio of free carbon is 1 wt.% or lower is heat-treated in the range of 750 to 950°C, so that a silica film F is formed on the surface of the powder.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2016,JPO&INPIT