| abstract |
(57) [Summary] [Problem] An object of the present invention is to suppress the progress of deterioration into the inside of a sintered body in the presence of hot water and, in addition, to excel in the stability of the surface smoothness of the sintered body. It is an object of the present invention to provide a sintered zirconia sintered body; and to provide a method capable of manufacturing the zirconia sintered body by a simple process. A zirconia sintered body containing Y 2 O 3 as a solid solution, wherein the degree of orientation of tetragonal phase crystal grains of the zirconia sintered body is 45% or less, and Y 2 O 3 wherein the concentration of Al 2 O 3 0 to 15 wt%, BET specific surface area of 1 Forming and sintering a zirconia fine powder having a particle size of 4 to 17 m 2 / g, a crystallite size of 22 to 30 nm, an average particle size of 0.3 to 0.9 μm, and a monoclinic phase ratio of 22% or less. A method for producing the zirconia sintered body, and an optical fiber connector component, a crusher ball, a pump component, a semiconductor substrate, and a biomaterial member, wherein the zirconia sintered body is precisely processed. |