Superconducting wire and superconducting coil

Patent metadata

Field	Value
Publication number	US-10964454-B2
Application number	US-201515540928-A
Country	US
Kind code	B2
Filing date	Dec 22, 2015
Priority date	Jan 7, 2015
Publication date	Mar 30, 2021
Grant date	Mar 30, 2021

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.

First claim

The invention claimed is:

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 Ca, Sr, and Ba 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 selected 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.

8. The superconducting wire according to claim 1 , wherein
the one or more additive elements further comprises at least one element selected from rare earth elements in an amount of 32 ppm or less.

Assignees

• Mitsubishi Materials Corp

Inventors

• FUKUOKA Kosei
• Ito Yuki
• Maki Kazunari

Classifications

• Y02E40/60

  Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment · CPC title

• H10N60/20

  Permanent superconducting devices · CPC title

• B22D11/12

  Accessories for subsequent treating or working cast stock in situ (rolling immediately subsequent to continuous casting B21B1/46, B21B13/22) · CPC title

• H01F6/06

  Coils, e.g. winding, insulating, terminating or casing arrangements therefor · CPC title

• H01B12/00

  Superconductive or hyperconductive conductors, cables, or transmission lines · CPC title