Superconductor precursor mixtures made by precipitation method
US4839339A · kind A · utility
36Cited by
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Key dates
| Filing date | Feb 25, 1988 |
| Grant date | Jun 13, 1989 |
| Priority date | — |
| Expiry date | Feb 25, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/815
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Method and apparatus for preparing highly pure homogeneous precursor powder mixtures for metal oxide superconductive ceramics. The mixes are prepared by instantaneous precipitation from stoichiometric solutions of metal salts such as nitrates at controlled pH's within the 9 to 12 range, by addition of solutions of non-complexing pyrolyzable cations, such as alkyammonium and carbonate ions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.