| 摘要 |
PROBLEM TO BE SOLVED: To provide a silicon nitride-based sintered compact with excellent mechanical strength.SOLUTION: The silicon nitride-based sintered compact with excellent strength, in which silicon nitride crystals are formed as a main phase and YSiAlON crystals are present in a grain boundary phase, can be obtained by adding yttria, alumina and silica powders as sintering aids to a silicon nitride powder and an Si powder raw materials, and molding and firing the mixture. |
