Title:
ビスマス系酸化物超伝導体の製造方法および超電導線
Document Type and Number:
Japanese Patent JP4706309
Kind Code:
B2
Abstract:
An object of the present invention is to provide a method of manufacturing a bismuth-based oxide superconductor capable of obtaining a high critical current density and a superconducting wire containing a bismuth-based oxide superconductor manufactured by this method. The present invention is directed to a method of manufacturing a bismuth-based oxide superconductor containing a 2223 phase having a 2223 composition in a composition Bi-Sr-Ca-Cu or (Bi,Pb)-Sr-Ca-Cu, comprising a first step of charging a raw material containing a 2212 phase having a 2212 composition in a composition Bi-Sr-Ca-Cu or (Bi,Pb)-Sr-Ca-Cu with a critical temperature of not more than 70 K into a metal sheath, a second step of performing plastic working on the metal sheath charged with the raw material and a third step of performing heat treatment on the metal sheath charged with the raw material.
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Inventors:
Naoki Ayai
Application Number:
JP2005110157A
Publication Date:
June 22, 2011
Filing Date:
April 06, 2005
Export Citation:
Assignee:
Sumitomo Electric Industries, Ltd.
International Classes:
C01G1/00; C01G29/00; H01B12/10; H01B13/00
Domestic Patent References:
| JP4237910A | ||||
| JP9115356A | ||||
| JP4212215A | ||||
| JP2000200520A |
Foreign References:
| WO1999013517A1 |
Other References:
Chunhai JIANG, et al.,Kinetics of phase formation and transport properties of Bi-2223/Ag tapes fabricated by various calcined powders,IEEE Transactions on Applied Superconductivity,June 2003, Vol.13, No.2,pp.2937-2940
Bernd SAILER, et al.,Effect of precursor powder properties on magnetic and electrical transport properties of (Bi,Pb)-2223-tapes,IEEE Transactions on Applied Superconductivity,March 2001, Vol.11, No.1,pp.2975-2978
Bernd SAILER, et al.,Effect of precursor powder properties on magnetic and electrical transport properties of (Bi,Pb)-2223-tapes,IEEE Transactions on Applied Superconductivity,March 2001, Vol.11, No.1,pp.2975-2978
Attorney, Agent or Firm:
Kuro Fukami
Toshio Morita
Yoshihei Nakamura
Yutaka Horii
Hisato Noda
Masayuki Sakai
Toshio Morita
Yoshihei Nakamura
Yutaka Horii
Hisato Noda
Masayuki Sakai