SUPERCONDUCTING WIRE, SUPERCONDUCTING WIRE PRECURSOR BODY AND FABRICATION METHOD THEREOF, AND SUPERCONDUCTING MULTI-CORE CONDUCTOR PRECURSOR BODY

WIPO Patent Application WO/2013/161930

A1

Provided are a superconducting wire, etc. having a wire length which is sufficiently longer than before, and a critical current density which is uniformly high over the entire length thereof. The density of a magnesium diboride (MgB2) core is 1.5g/cm3 or higher. In a void (4) which is present in an arbitrary vertical cross-section of the superconducting wire (10) in the longitudinal direction, with a length of a line segment which joins the most distant points in a closed curve which forms the void (4) designated L, among the voids (4) with length L of 20µm or greater, the number of gaps with an angle formed by the line segment and the axis in the longitudinal direction of the superconducting wire (10) of 45° or greater is fewer than the number of voids (4) with the angle formed by the line segment and the axis in the longitudinal direction of the superconducting wire (10) of less than 45°. In an arbitrary 100µm region of the longitudinal direction of the vertical cross-section, when a virtual straight line approximated by least squares is drawn for a boundary curve between an MgB2 core (1) and a metallic sheath (2), the distance between the approximate straight line and the boundary curve is 10µm or less.

JP2557486	[Title of the Invention] A method for manufacturing a long body of superconducting ceramics and a long body of superconducting ceramics.
JPH11185543	SUPERCONDUCTING WIRE MATERIAL AND MANUFACTURE OF SUPERCONDUCTING WIRE AND MANUFACTURING DEVICE FOR SUPERCONDUCTING WIRE MATERIAL
JPH04355012	MANUFACTURE OF OXIDE SUPERCONDUCTIVE WIRE ROD

KODAMA MOTOMUNE (JP)
TANAKA KAZUHIDE (JP)
SHIMOYAMA JUNICHI (JP)
YAMAMOTO AKIYASU (JP)

PCT/JP2013/062185

October 31, 2013

April 25, 2013

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UNIV TOKYO (JP)
HITACHI LTD (JP)

H01B12/04; C01B35/04; C01G1/00; H01B12/08; H01B13/00; H01F6/06

JP2007059261A	2007-03-08
JP2005310600A	2005-11-04
JP2006269277A	2006-10-05
JP2009134969A	2009-06-18
JP2006236939A	2006-09-07
JP2006127898A	2006-05-18
JP4667638B2	2011-04-13
JP2003031057A	2003-01-31

See also references of EP 2843671A4

ISONO Michizo (JP)
Michizo Isono (JP)

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