Production of oxide superconductors having large magnetic levitation force
US5474976A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Mar 29, 1993 |
| Grant date | Dec 12, 1995 |
| Priority date | — |
| Expiry date | Mar 29, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N60/857
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for producing an REBaCuO oxide superconductor having large magnetic levitation force, where RE is a rare earth element selected from the group consisting of Y, Sm, Eu, Gd, Dy, Ho, Er, and Yb, involves the steps of using a raw material mixture as the starting feed, heating the raw material mixture for partial melting, followed by cooling and solidification, pulverizing and mixing the resulting solid, shaping the resulting mixture into a given shape, placing or embedding nucleates on or in the resulting shape, followed by heating for partial melting, and cooling the resulting partial melt to a substantial temperature at which a superconducting phase starts to form, followed by slow cooling, whereby the superconducting phase is preferentially formed and grown from a nucleation site.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.