Synthesis process for advanced ceramics
US5505865A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1992 |
| Grant date | Apr 9, 1996 |
| Priority date | — |
| Expiry date | Apr 14, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/2658
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for synthesizing advanced ceramics having superior microstructures and properties. Metal oxide powder particles are produced from solutions of soluble salts of the respective metals by a spray decomposition process. The as-formed powders are heated in an inert atmosphere at a temperature below their sintering temperature and for a time sufficient to cause the oxide powder particles to densify without sintering, and the densified powder is then compacted under high pressure and finally sintered at a temperature above that employed in the initial heating step. Products of this process possess superior magnetic and structural uniformity, excellent grain structure, and very high mechanical strength relative to ceramics prepared without using a heat treatment for densification prior to the compacting step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.