Bi-Pb-Sr-Mg-Ba-Ca-Cu-O oxide superconductors and production thereof
US5194421A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1991 |
| Grant date | Mar 16, 1993 |
| Priority date | — |
| Expiry date | Nov 20, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/782
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides an oxide superconductor which is mainly composed of bismuth, lead, strontium, calcium, magnesium, and copper and has the composition represented by the formula: EQU Bi.sub.1-A Pb.sub.A Sr.sub.1-B Mg.sub.B Ca.sub.1 Cu.sub.1.7.+-.0.3 Ox wherein A=0.15-0.35 and B=0.05-0.3 in which numerals represent atomic ratio and an oxide superconductor which is mainly composed of bismuth, lead, strontium, calcium, magnesium, barium and copper and has the composition represented by the formula: EQU Bi.sub.1-A Pb.sub.A Sr.sub.1-(B+C) (Mg.sub.B Ba.sub.C)Ca.sub.1 Cu.sub.1.7.+-.0.3 Ox wherein A=0.15-0.35, B=0.05-0.3 and C=0.02-0.2 in which numerals represent atomic ratio. Methods for producing these superconductors are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.