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Title:
SUPERCONDUCTING WIRE AND MANUFACTURING METHOD FOR SAME, AS WELL AS SUPERCONDUCTING COIL
Document Type and Number:
WIPO Patent Application WO/2014/162379
Kind Code:
A1
Abstract:
In a superconducting wire having a core including Mg and B, and a metal sheath covering the core, properties of B included in a first superconducting portion including one end of the superconducting wire, and of B included in a second superconducting portion including the other end of the superconducting wire, are different. In addition, in a core that includes MgB2 generated by heat-treatment of Mg and B, and superconducting wire having a metal sheath covering the core, properties of the B included in the first superconducting portion including the one end of the superconducting wire, and of the B included in the second superconducting portion including the other end of the superconducting wire, are different. Furthermore, the invention has steps for: generating a first powder by mixing Mg, and B of an average particle size of less than 2 μm; generating a second powder by mixing Mg, and B of an average particle size of greater than or equal to 2 μm and less than or equal to 15 μm; from one end of the metal sheath, filling with the first powder, and filling the same with the second powder from the other end; drawing the filled metal sheath; and heat-treating the drawn metal sheath.

Inventors:
TANAKA KAZUHIDE (JP)
ICHIKI YOTA (JP)
KODAMA MOTOMUNE (JP)
Application Number:
JP2013/059814
Publication Date:
October 09, 2014
Filing Date:
April 01, 2013
Export Citation:
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Assignee:
HITACHI LTD (JP)
International Classes:
H01F6/06
Foreign References:
JPS6325905A1988-02-03
JPS62109410U1987-07-13
JPS62170109A1987-07-27
JP2008226501A2008-09-25
JP2006107841A2006-04-20
JPH02242533A1990-09-26
JPH11250746A1999-09-17
JPH07130533A1995-05-19
Other References:
YUKARI KATSURA ET AL.: "Grain Size Determinants and Grain-Boundary Pinning in In-situ MgB2 Bulks", CRYOGENIC ENGINEERING, vol. 41, no. 11, 2006, pages 497 - 504
Attorney, Agent or Firm:
INOUE Manabu et al. (JP)
Manabu Inoue (JP)
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