SINTERING CASE FOR HIGHLY THERMAL-CONDUCTIVE SILICON NITRIDE SINTERED BODY AND PRODUCTION PROCESS OF HIGHLY THERMAL-CONDUCTIVE SILICON NITRIDE SINTERED BODY USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a sintering case which is particularly suitable for sintering a highly thermal-conductive silicon nitride sintered body and can also be used for sintering at a ≥1,800°C high temperature, irrespective of the composition of an unsintered body to be sintered and also to provide a process for producing the silicon nitride sintered body by using the sintering case. ;SOLUTION: The manufacturing process of this sintering case comprises, mixing a powdery silicon nitride raw material or powdery silicon carbide raw material, various sintering aids and a binder to prepare a raw material for a sintering case then forming the sintering case raw material into a green body and thereafter, sintering the green body in an nitrogen atmosphere when the green body consists essentially of silicon nitride, or in an argon atmosphere when the green body consists essentially of silicon carbide, to manufacture the objective sintering case having a ≤3.5 wt.% Al content. Also, the objective highly thermal-conductive silicon nitride sintered body is produced by sintering a corresponding green body at ≥1,800°C in a nitrogen-containing atmosphere by using the sintering case.;COPYRIGHT: (C)2001,JPO