Citrate/ethylenediamine gel method for forming high temperature superconductors
US5066636A · kind A · utility
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Key dates
| Filing date | Aug 15, 1990 |
| Grant date | Nov 19, 1991 |
| Priority date | — |
| Expiry date | Aug 15, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/737
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A citrate/ethylenediamine gel method for forming oxide superconductors of the Y-Ba-Cu-O, Bi-Ca-Sr-Cu-O, Tl-Ca-Ba-Cu-O system by employing the nitrates of the individual metals and citric acid. Ethylenediamine is then added to form gels. These materials then undergo calcination and sintering processes. The respective superconductors obtained possess a superconducting zero resistance temperature at 93K, 78K and 118K respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.