| 摘要 |
PROBLEM TO BE SOLVED: To obtain an alumina sintered compact having high resistance to crack occurrence and breaking caused by quick heating and quick cooling, namely high thermal shock resistance and excellent durability and corrosion resistance. SOLUTION: This thermal shock-resistant alumina sintered compact has >=97 wt.% alumina content and 0.1-3 wt.% zirconia content, comprises zirconia crystal particles existing in alumina crystal grain and zirconia segregated in alumina grain boundary, has 8-70 μm average crystal particle diameter of sintered compact and >=3.7 g/cm3 bulk density of sintered compact. A member for heat treatment comprises the thermal shock-resistant alumina sintered compact. |
