Zirconia sintered body, process for production thereof, and application thereof
AssigneeTosoh Corporation
InventorsNobukatsu Oomichi, Koji Matsui, Akemi Kato, Michiharu Oogai
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Abstract
A novel zirconia sintered body is provided which contains Y.sub.2 O.sub.3 in a solid solution state, and has tetragonal crystal grains oriented at an orientation degree of not higher than 45%. A process for producing the zirconia sintered body is also provided. This zirconium sintered body deteriorates less, and excellent in stability of surface smoothness, and can be produced by a simple process.
Claims6
A zirconia sintered body, containing Y.sub.2 O.sub.3 at a concentration ranging from 2 to 3.5 mol % in a solid solution state, consisting essentially of tetragonal crystal grains and cubic crystals, said tetragonal crystal grains oriented at an orientation degree of not higher than 45%, wherein the average crystal grain diameter (D in .mu.m) of the tetragonal phase or the cubic phase and the concentration of Y.sub.2 O.sub.3 (X in mol %) satisfy the relation:
- 0<D<0.12X+0.06.
Dependencies are inferred from the claim text.