Patent ID: 7291574
Filing Date: 2007-11-06
Classification: C01G,C01P,C04B

Abstract:
1. A zirconia sintered body comprising tetragonal zirconia, wherein a full width at half maximum at (111) plane of the tetragonal zirconia obtained by X-ray diffraction pattern measured under the following conditions is from 0.38 to 4 degrees having the following conditions: wherein the zirconia sintered body contains Al 2 O 3 and an amount of Al 2 O 3 in the zirconia sintered body is about 0.5% by weight or less, and wherein the zirconia sintered body contains a stabilizer and an amount of the stabilizer in the zirconia sintered body is about 2% by weight or more and 5.25% by weight or less, and the stabilizer is at least one selected from the group consisting of Y 2 O 3 , CeO 2 , TiO 2 , Yb 2 O 3 , Er 2 O 3 , and Ho 2 O 3 , and wherein an average grain size of the zirconia sintered body is from 0.01 to 0.2 μm and a density of the zirconia sintered body is 6.00 g/cm 3 or more.