| abstract |
Until now, a zirconia sintered body having high esthetics, particularly a color tone and translucency equivalent to that of a natural tooth, and having high strength can not be obtained. It is an object of the present invention to provide a zirconia sintered body having not only high strength but also excellent aesthetics. Wherein the light transmittive zirconia sintered body comprises an iron compound and 2 to 4 mol% yttria, and has a lightness L * in the L * a * b * color system of 51 or more and 80 or less and a relative density of 99.80% to provide. The colored zirconia sintered body preferably has a sample thickness of 1 mm and a total light transmittance of 20% or more in a D65 light source. The colored translucent zirconia sintered body of the present invention is particularly suitable for a zirconia sintered body used for dental use, furthermore, a mill blank such as a denture material, and an orthodontic bracket. |