Sintered body, powder and method for producing the same
AssigneeTosoh Corporation
InventorsKoji Matsui, Kohei Hosoi
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Abstract
There is provided a raw material for a zirconia sintered body formed by pressureless sintering and having a high fracture toughness value measured by an SEPB method, a sintered body formed from the raw material, and a method for producing at least one of the raw material and the sintered body. Also provided is a sintered body that includes zirconia that contains a stabilizer and having a monoclinic fraction of 0.5% or more. Such a sintered body is produced by a method including using a powder that contains a stabilizer and zirconia with a monoclinic fraction of more than 70%, wherein monoclinic zirconia has a crystallite size of more than 23 nm and 80 nm or less.
Claims19
A sintered body comprising zirconia that contains a stabilizer and having a monoclinic fraction of 0.5% or more, prepared from a powder comprising a stabilizer and zirconia with a monoclinic fraction of more than 70%, wherein a crystallite size of monoclinic zirconia is more than 23 nm and 80 nm or less,
- wherein the zirconia has a crystal phase containing monoclinic zirconia and tetragonal zirconia, and
- wherein the powder contains no undissolved stabilizer.
A powder comprising a stabilizer and zirconia with a monoclinic fraction of more than 70%, wherein a crystallite size of monoclinic zirconia is more than 23 nm and 80 nm or less,
- wherein the zirconia has a crystal phase containing monoclinic zirconia and tetragonal zirconia, and
- wherein the powder contains no undissolved stabilizer.
Dependencies are inferred from the claim text.