Stabilised metallic oxides
US4820593A · kind A · utility
8Cited by
3References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1987 |
| Grant date | Apr 11, 1989 |
| Priority date | — |
| Expiry date | Dec 17, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2993
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Zirconia has been used in the manufacture of ceramics for many years. The desirability of stabilizing the crystal form has been recognized and one or more stabilizing agents have been used. The present invention produced a stabilized zirconia carrying a coating of at least one hydrous oxide of yttrium, calcium, magnesium, strontium, barium or cerium. Preferably also a hydrous oxide of zirconium is also present either as a separate inner layer or mixed with the other hydrous oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.