Process for obtaining refractory metal oxides based on silica by sol-gel route in aqueous medium
US5130110A · kind A · utility
17Cited by
3References
4Claims
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Key dates
| Filing date | Dec 18, 1990 |
| Grant date | Jul 14, 1992 |
| Priority date | — |
| Expiry date | Dec 18, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/84
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Process for obtaining by sol-gel route refractory metal oxides based on silica in which a monolithic gel is prepared, in an aqueous medium, at a temperature of less than 60.degree. C., by leaving at rest an aqueous sol obtained by simple mixing in stoichiometric quantities of an aqueous sol of silicic acid and of one or more aqueous solutions of a water-soluble salt of one or more other constitutive metals of these oxides, then the monolithic gel obtained is calcined at a temperature of less than 1000.degree. C. after it has been dried at a temperature of less than 150.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.