Title:
【発明の名称】Nb3Sn交流超電導線の製造方法
Document Type and Number:
Japanese Patent JP3086487
Kind Code:
B2
Abstract:
PURPOSE:To enhance a critical current density without exerting any adverse effect of a thermal treatment on other structures by setting a diameter of an Nb filament at 1mum or smaller, and applying a thermal treatment at 500 deg.C or lower for one day or longer. CONSTITUTION:A quantity of Sn required for producing Nb3Sn is dispersed to be embedded in or between bundles so as to be located in the vicinity of an Nb filament. A diameter of the Nb filament is set 1mum or smaller, and a longtime thermal treatment is applied at a temperature of 500 deg.C or lower for one day or more, where a material of structures other than the superconductive wire can be in an annealed state so as to prevent deterioration of mechanical strength. A critical current density Jc becomes higher as the temperature becomes lower than 500 deg.C, and further, a high current density Jc can be obtained in a longer thermal treatment as the temperature becomes lower. The thermal treatment at 475-425 deg.C for 40 to 180 days is preferable.
Inventors:
Akita style
Tanaka
Takeshi Ogasawara
Hisayuki Kobayashi
Kazuhiko Yasohama
Yoji Kubota
Tanaka
Takeshi Ogasawara
Hisayuki Kobayashi
Kazuhiko Yasohama
Yoji Kubota
Application Number:
JP1563291A
Publication Date:
September 11, 2000
Filing Date:
January 17, 1991
Export Citation:
Assignee:
CENTRAL RESEARCH INSTITUTE OF ELECTRIC POWER INDUSTRY
International Classes:
C22F1/00; C23C10/28; H01B12/10; H01B13/00; (IPC1-7): H01B13/00; C22F1/00
Domestic Patent References:
| JP2288112A | ||||
| JP2109212A | ||||
| JP63216212A |
Attorney, Agent or Firm:
Kazumi Murase