Production of a superconductor powder having a narrow melting transition width using a controlled oxygen atmosphere
US5149684A · kind A · utility
14Cited by
4References
11Claims
0Family size
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Key dates
| Filing date | Apr 9, 1991 |
| Grant date | Sep 22, 1992 |
| Priority date | — |
| Expiry date | Apr 9, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/779
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for preparing a superconductor-coated substrate including calcining a mixture of powdered yttrium or rare earth oxide (R), barium carbonate and copper oxide in a controlled atmosphere and in accordance with a predetermined temperature profile to form a superconductor powder having a stoichiometric ratio of R-Ba-Cu of approximately 1-2-3. The melting transition width of the resulting powder is relatively narrow, such that the melting onset temperature is above the high temperatures advantageously used to sinter the powder on the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.