| 摘要 |
PURPOSE:To stably impart such characteristics as strength at high temp., fracture toughness and thermal shock resistance to a sialonor silicon nitride-based ceramic sintered body when this sintered body is produced with hafnium oxide. CONSTITUTION:When a silicon nitride-based ceramic sintered body contg. the oxide of a rare earth element, aluminum nitirde and hafnium oxide or a sialon- based ceramic sintered body contg. hafnium oxide is produced, hafnium oxide is added to a starting material mixture in the form of a hafnium-contg. org. compd. which is liq. at ordinary temp. This hafnium-contg. org. compd. is, e.g. hafnium alkoxide. |
