Zirconia sintered body and a method for producing the same
US7291574B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2004 |
| Grant date | Nov 6, 2007 |
| Priority date | — |
| Expiry date | Feb 25, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/96
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A zirconia sintered body having high strength and high toughness is provided, and a method for producing the same is also provided. The zirconia sintered body comprising tetragonal zirconia, wherein a full width at half maximum at (111) plane of the tetragonal zirconia obtained by X-ray diffraction pattern is from 0.38 to 4 degree. A method for producing the zirconia sintered body, wherein the method comprises steps of; molding zirconia powder having an average particle diameter of from 0.1 to 0.6 μm, a maximum particle diameter of 5 μm or less and a substantially polyhedral shape, and then sintering the molded green body under the temperature of from 1200 to 1400° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.