| abstract |
The invention relates to a sintered ceramic body of Y 2 O 3 -stabilized zirconium oxide, with a sintering density of at least 99% of the theoretical sintered density, which is characterized in that the sintered shaped body has a mean grain size <180 nm and the zirconium oxide portion of the sintered body of tetragonal Phase and cubic phase exists. The sintered molded article is stable against hydrothermal aging for at least 120 hours at 134 ° C. in a steam atmosphere. The invention further relates to a method for producing a sintered ceramic body from a Y 2 O 3 -stabilized zirconium oxide, comprising the steps of: dispersing a sub-micron powder; Crushing the dispersed sub-micron powder, wherein the sub-micron powder is comminuted to a particle size d 95 <0.42 microns; Shaping the dispersion into a body and sintering the body to form the sintered body. The sintered shaped body according to the invention can be used for implants, linings of technical equipment and for technical components, which may be subject to hydrothermal aging. |