Bi-Pb-Sr-Ca-Cu oxide superconductor containing alkali metal and process for preparation thereof
US5108985A · kind A · utility
4Cited by
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11Claims
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Key dates
| Filing date | Oct 17, 1990 |
| Grant date | Apr 28, 1992 |
| Priority date | — |
| Expiry date | Oct 17, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/782
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Disclosed is a process for the preparation of a composite metal oxide superconductor, in which a composite metal oxide composition comprising Bi, Pb, Sr, Ca and Cu and further containing an alkali metal at a specific ratio is used as the starting material, and this composite metal oxide composition is molded and fired. According to this process, precipitation of the 80 K phase and other impurities is controlled, and a superconductor containing a large quantity of the 110 K phase and a high critical temperature is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.