Zirconia sintered body and production method thereof
US11746055B2 · kind B2 · utility
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7Claims
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Key dates
| Filing date | Sep 14, 2022 |
| Grant date | Sep 5, 2023 |
| Priority date | — |
| Expiry date | Sep 14, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/9653
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A zirconia powder is provided comprising a yttria source and zirconia, wherein a content of the yttria source is 4.5 mol % or more and 6.5 mol % or less and the remainder is zirconia, a ratio of a total of tetragonal and cubic crystals to an entire crystal phase of zirconia is 90% or less, a BET specific surface area is 7.5 m2/g or more and 15 m2/g or less, and an average crystallite size is 325 Å or greater. The powders are useful in producing sintered bodies having the mechanical strength and the translucency desired for use in dental prosthetic materials, and precursors thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.