Process for the preparation of double metal oxide powders containing a Group IIIA and a Group IVB element and a novel double metal hydroxyl carboxylate useful in preparing same
US5196388A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 10, 1991 |
| Grant date | Mar 23, 1993 |
| Priority date | — |
| Expiry date | Jun 10, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/626
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Disclosed is a process for the preparation of double metal oxide ceramic powders which contain at least one metal of Group IIIA, inclusive of aluminum and gallium, and at least one metal of Group IVB, inclusive of titanium and zirconium. The process involves a first step in which an aqueous solution of mixed metal alkoxides or salts is formed and which also contains a chelating agent, preferably a polycarboxylic acid, and a second step in which a base is added in order to cause precipitation of a mixed metal hydroxyl groups-containing precursor that can be calcined or otherwise converted to the final mixed metal oxide. The invention also pertains to novel double metal hydroxyl carboxylates which are useful intermediates in preparing double metal oxides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.