Method for manufacture of high-strength sintered article of substances having beta -silicon nitride type crystal structure

摘要

A high-strength sintered article of chemical substances having the beta -silicon nitride type crystal structure is produced by blending 50 to 99.9 weight percent of a beta -silicon nitride and/or beta '-Sialon and 50 to 0.1 weight percent of a mixture, as a sintering aid, consisting of BeO, Ga2O3, and Al2O3 in respective amounts such as to have a Ga2O3/BeO ratio in the range of from 2.8 to 9.4, an Al2O3/BeO ratio in the range of from 0.0 to 2.6, and an Al2O3/Ga2O3 ratio in the range of from 0.0 to 1.1, all ratios being ratios by weight and sintering the resultant blend.