Sintered zirconia, and composition for sintering and calcined body therefor

摘要

A sintering composition and calcined object which are precursors for a sintered zirconia. The burned surface of the sintered zirconia gives an X-ray diffraction pattern in which the ratio of the height of the peak present around the location where a [200] peak assigned to the cubic system is to appear to the height of the peak present around the location where a [200] peak assigned to the tetragonal system is to appear is 0.4 or more, and a region located at a depth of 100 μm or more from the burned surface gives an X-ray diffraction pattern in which the ratio of the height of the peak present around the location where a [200] peak assigned to the cubic system is to appear to the height of the peak present around the location where a [200] peak assigned to the tetragonal system is to appear is 0.3 or less.

主权项

1. A zirconia sintered body,
wherein, when a burned surface or an exposed surface is ground so that a surface, in which a first peak ratio is 0.3 or less, is exposed and then burned again, in an X-ray diffraction pattern, the first peak ratio being a ratio of a height of a peak existing near a position where a cubic [200] peak appears to a height of a peak existing near a position where a tetragonal [200] peak appears, in an X-ray diffraction pattern of a re-burned surface, a second peak ratio is 0.4 or more, the second peak ratio being the ratio of the height of the peak existing near the position where the cubic [200] peak appears to the height of the peak existing near the position where the tetragonal [200] peak appears.