| 摘要 |
Zirconia ceramics consisting mainly of ZrO2 and Y2O3 in a molar ratio of Y2O3/ZrO2 of 2/98 DIFFERENCE 7/93 and consisting of crystal grains having a mixed phase consisting essentially of tetragonal phase and cubic phase or having a phase consisting essentially of tetragonal phase, the average size of the crystal grains being not larger than 2 mu m, has a high strength and shows little deterioration of strength due to the lapse of time, and is suitable as a solid electrolyte for oxygen concentration cells, machine parts for internal combustion engines, thermistors, cutting tools and other industrial materials.
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