| 摘要 |
PURPOSE:To provide a sintered silicon nitride ceramic having improved mechanical strength under high-temperature condition and especially further improved oxidation resistance under severe temperature condition at >=1200 deg.C. CONSTITUTION:The objective sintered silicon nitride ceramic is produced by baking a ceramic mixture composed of 1-10wt.% of MgO.Al2O3 spinel structure, 1-10wt.% of aluminum nitride, 0.1-5wt.% of at least one kind of compound selected from oxide, carbide or silicide of Hf, Nb or Ti and the remaining part of silicon nitride. |
