Superconducting wire and superconducting coil

Abstract

The present invention is a superconducting wire including: a wire formed of a superconducting material; and a superconducting stabilization material disposed in contact with the wire, in which the superconducting stabilization material is formed of a copper material which contains: one or more types of additive elements selected from Ca, Sr, Ba, and rare earth elements in a total of 3 ppm by mass to 400 ppm by mass; a balance being Cu and inevitable impurities, and in which a total concentration of the inevitable impurities excluding O, H, C, N, and S which are gas components is 5 ppm by mass to 100 ppm by mass.

1 . A superconducting wire comprising:
 a wire formed of a superconducting material; and   a superconducting stabilization material disposed in contact with the wire,   wherein the superconducting stabilization material is formed of a copper material which contains: one or more additive elements selected from rare earth elements in a total of 3 ppm by mass to 400 ppm by mass; and a balance being Cu and inevitable impurities, and in which a total concentration of the inevitable impurities excluding O, H, C, N, and S which are gas components is 5 ppm by mass to 100 ppm by mass.   
     
     
         2 . The superconducting wire according to  claim 1 ,
 wherein the inevitable impurities comprise; Fe in a range of 10 ppm by mass or less, Ni in a range of 10 ppm by mass or less, As in a range of 5 ppm by mass or less, Ag in a range of 50 ppm by mass or less, Sn in a range of 4 ppm by mass or less, Sb in a range of 4 ppm by mass or less, Pb in a range of 6 ppm by mass or less, Bi in a range of 2 ppm by mass or less, and P in a range of 3 ppm by mass or less.   
     
     
         3 . The superconducting wire according to  claim 1 ,
 wherein the superconducting stabilization material is formed of the copper material in which a ratio Y/X of the total amount of the one or more additive elements (Y ppm by mass) to a total amount of S, Se, and Te (X ppm by mass) is in a range of 0.5≤Y/X≤100.   
     
     
         4 . The superconducting wire according to  claim 1 ,
 wherein the superconducting stabilization material is formed of the copper material in which a compound, which contains the one or more additive elements and one or more elements selected from S, Se, and Te, is present.   
     
     
         5 . The superconducting wire according to  claim 1 ,
 wherein the superconducting stabilization material has a residual resistance ratio (RRR) of 250 or more.   
     
     
         6 . The superconducting wire according to  claim 1 ,
 wherein the superconducting stabilization material is manufactured by a continuous casting rolling method.   
     
     
         7 . A superconducting coil comprising:
 a winding wire part formed by winding the superconducting wire according to  claim 1  around an outer surface of a winding frame.