Stabilized zirconia particulates
US4786486A · kind A · utility
4Cited by
5References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1987 |
| Grant date | Nov 22, 1988 |
| Priority date | — |
| Expiry date | Mar 16, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/90
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Submicronic zirconia particulates containing stabilizing amounts of yttrium or cerium, well adapted for ceramics applications, are produced by (i) admixing an aqueous suspension of zirconium fluosulfate particles having a pH of from about 0 to 3 with an aqueous solution of a salt of yttrium or cerium, (ii) neutralizing the resulting mixture at a pH of at least 7, (iii) separating a mixture of zirconium/yttrium or zirconium/cerium hydroxides from the medium of neutralization, (iv) washing said mixture of hydroxides to eliminate sulfate and fluoride ions therefrom, and then (v) calcining said mixture of hydroxides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.