Oxide superconductor current lead and method of manufacturing the same
US6216333A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1997 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Sep 11, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49014
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An oxide superconductor current lead provided with a rod-like or pipe-like oxide superconductor, at each of end parts of which a metallic electrode is formed. In this oxide superconductor current lead, the oxide superconductor is a Bi.sub.2 Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.X superconductor. Further, the metallic-electrode-portion contact resistivity thereof is not more than 0.05 .mu..OMEGA..multidot.cm.sup.2. Moreover, the critical current density is not less than 2,000 A/cm.sup.2. Furthermore, there is provided a method of manufacturing such an oxide superconductor current lead. To perform this method, optimum conditions for conducting a heat treatment when forming electrodes at both ends of an oxide superconductor current lead are detected. Thereby, the contact resistivity during a superconducting coil becomes extremely small. Further, the critical current density is considerably enhanced. In the case of this method, an oxide superconductor (8) obtained by finishing a final sintering process is first worked into or shaped like a rod or a pipe. Then, metallic electrode portions (9) are formed by winding metallic foil around end parts of the superconductor, or by applying metallic …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.