Stabilised zirconia and a process for the preparation thereof
US3957500A · kind A · utility
23Cited by
3References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 15, 1974 |
| Grant date | May 18, 1976 |
| Priority date | — |
| Expiry date | Apr 15, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/50
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Stabilised zirconia is obtained by mixing zirconia with an impure yttria concentrate containing 35-70% by weight yttria with the remainder being substantially heavy and light rare earth metal oxides, such concentrate being prepared from a naturally occurring mineral material. Sufficient concentrate is used so that the stabilised zirconia body contains at least 3 mole percent of yttria and heavy rare earth metal oxides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.