Zirconia ceramics and process for producing the same

摘要

A sintered body of zirconia ceramic comprising 74 to 87% by weight of ZrO2 and 26 to 13% by weight of CeO2, and 0.1 to 20% by weight of Al2O3 and 99.9-80% by weight of ZrO2-CeO2 in the form of tetragonal crystals with 20% by weight or less of monoclinic and/or cubic crystals, is excellent in mechanical strength, were resistance and thermal stability.