| 摘要 |
A ZrO2 porcelain comprising a cylindrical member and a flexible member made of a ZrO2 porcelain which has a relative density not lower than 95% and contains a cubic crystal at a ratio not lower than 75%, thereby exhibiting high erosion resistance and high strength. It is preferable that the ZrO2 porcelain is composed of a tetragonal crystal or a mixture phase consisting of a cubic crystal and a tetragonal crystal or a cubic crystal, a tetragonal crystal and a monoclinic crystal |
