| 摘要 |
PURPOSE:To obtain the title dense sintered body having superior bending strength and undergoing no deterioration even at high temp. by mixing powders of plural kinds of compds. selected among SiO2, Al2O3, Si3N4 and AlN in a prescribed atomic ratio of Si:Al:O:N and by compacting and sintering the mixture. CONSTITUTION:Powders of three or more kinds of compds. selected among SiO2, Al2O3, Si3N4 and AlN are mixed in 6+ or -1:7+ or -1:18+ or -1:3+ or -2 atomic ratio of Si:Al:O:N. The pref. purity of each of the compds. is >=99%. The mixture is compacted and the resulting green compact is sintered by heating to 1,640-1,680 deg.C in N2 under 10-200atm pressure. |
