公开了一种陶瓷烧结体，其含有烧结密度为理论烧结密度的至少99％且平均粒径<180nm的Y 2 O 3稳定化氧化锆。 烧结体的氧化锆部分包括四方晶相和立方相。 还公开了一种用于生产含有Y 2 O 3稳定的氧化锆的陶瓷烧结体的方法，该方法包括通过使用直径小于或等于100的研磨介质将亚微米粉末分散并分散分散的亚微米粉末 μm至粒径d95 <0.42μm; 使形成体的分散体成形，以及烧结体以形成烧结体。

The invention Y ₂ O ₃ - as comprising a stabilized zirconia on the ceramic formed body sintered with a greater than 99% sintered density of the theoretical chemical sintered density, and an average particle size <180 nm of the sintered molded body, the zirconia of the sintered molded body It characterized in that the fraction contains a tetragonal phase and a cubic phase. Sintered molded article is stable to hot water aging for at least 120 hours at 134 ℃ and 2 bar in the water vapor atmosphere. The invention also, Y ₂ O ₃ - relates to a production process of the sintered ceramic formed body comprising a stabilized zirconia, dispersing sub-micron powder; The method comprising grinding the sub-micron powder, in which the step of using the pulverization medium than 100 ㎛ diameter grinding the dispersed sub-micron powder with a grain size d ₉₅ of less than 0.42 ㎛; A step of forming a dispersion, forming an object (body), and a step of sintering the object, forming a sintered molded article. Sintered molded article according to the present invention can be used in the technical constituents, which may be treated as the liner (liner), and hydrothermal aging of the implant, technical facilities.