Sintered alumina-zirconia ceramic bodies
US4960441A · kind A · utility
162Cited by
18References
37Claims
0Family size
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Key dates
| Filing date | May 9, 1988 |
| Grant date | Oct 2, 1990 |
| Priority date | — |
| Expiry date | May 9, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K3/1427
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Useful ceramic bodies can be made by mixing zirconia powder with seeded alumina gel, drying, and firing at a high enough temperature to convert the alumina in the gel to microcrystalline alpha alumina. Abrasive grits made in this way, with a zirconia content between 15 and 30 weight percent and at least half the zirconia in the tetragonal crystal form are particularly valuable for use in grinding wheels for snagging steels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.