Method of preparing ceramic composite powders and the powders obtained thereby
US5064791A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1990 |
| Grant date | Nov 12, 1991 |
| Priority date | — |
| Expiry date | Jul 11, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/96
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A manufacturing method for ceramic-ceramic composite powders including the steps of; forming a suspension by mixing an inorganic powder having a cation-exchange property with a solution containing one or more metal ions to conduct ion exchange with the metal ions on the surface of the inorganic powder; adding to the suspension a precipitant-forming material which releases an anion in a solution when heated or pressurized; heating or pressurizing the suspension to release the anion which reacts with the metal ions to thereby precipitate metal hydroxides, metal basic salts or metallic salts on the surface of the inorganic powder; and thereafter heating the inorganic powder with the resultant precipitates to convert the precipitates into metal oxides. Metal-ceramic composite powders are manufactured by reducing the above metal oxides on the surface of the inorganic powder to metal. In the composite powders any arbitrary amount of metal oxides or metal is supported on the surface of the inorganic powder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.