Low-temperature superconducting wire having low stabilizing matrix ratio, and superconducting coil having same

Patent metadata

Field	Value
Publication number	US-10629332-B2
Application number	US-201616330745-A
Country	US
Kind code	B2
Filing date	Nov 22, 2016
Priority date	Sep 6, 2016
Publication date	Apr 21, 2020
Grant date	Apr 21, 2020

Abstract

Provided is a low-temperature superconducting wire having a low stabilizing matrix ratio. The present invention provides a superconducting wire including: a low-temperature superconducting filament; a stabilizing Matrix encompassing the filament; and a sheath of a Metal-Insulator Transition (MIT) material, which encompasses the stabilizing matrix on the exterior of the stabilizing matrix. According to the present invention, a low stabilizing matrix ratio is achieved while coping with heat caused by a quench phenomenon, thereby reducing manufacturing cost and achieving a high current density.

First claim

The invention claimed is:

1. A superconducting wire, comprising:
a low-temperature superconducting filament;
a stabilizing matrix encompassing the filament; and
a sheath of a Metal-Insulator Transition (MIT) material, which encompasses the stabilizing matrix on the exterior of the stabilizing matrix,
wherein the MIT material has a transition temperature of a room temperature or lower.

2. The superconducting wire of claim 1 , wherein the MIT material has a transition temperature of less than a critical temperature of the superconducting filament+150 K.

3. The superconducting wire of claim 1 , wherein the MIT material has a transition temperature of less than a critical temperature of the superconducting filament+100 K.

4. The superconducting wire of claim 1 , wherein the MIT material includes a vanadium oxide.

5. The superconducting wire of claim 1 , wherein the MIT material includes VO.

6. The superconducting wire of claim 1 , wherein the MIT material includes a minimum of one kind of material selected from the group consisting of V n O 2n-1 (herein, n=2 to 9).

7. The superconducting wire of claim 1 , wherein the MIT material includes a minimum of one kind of material selected from the group consisting of Fe 3 O 4 , RNiO 3 (R=La, Sm, Nd, or Pr), La 1-x Sr x NiO 4 (herein, x<1), NiS 1-x Se x (herein, x<1), and BaVS 3 .

8. The superconducting wire of claim 1 , wherein the low-temperature superconducting filament includes a minimum of one kind of material selected from the group consisting of NbTi, NbZr, Nb 3 Sn, V 3 Ga, Nb 3 Ge, and Nb 3 Al.

9. A low-temperature superconducting coil, in which a low-temperature superconducting wire including a low-temperature superconducting filament and a stabilizing matrix encompassing the filament is wound,
wherein a Metal-Insulator Transition (MIT) material is interposed between adjacent low-temperature superconducting wires, and
wherein the MIT material has a transition temperature of a room temperature or lower.

10. The low-temperature superconducting coil of claim 9 , wherein the MIT material is in contact with the stabilizing matrix.

11. The low-temperature superconducting coil of claim 9 , wherein the low-temperature superconducting wire is a first low-temperature superconducting wire, the stabilizing matrix of the first low-temperature superconducting wire is a first stabilizing matrix, and the filament of the first low-temperature superconducting wire is a first filament, the coil further comprising a second low-temperature superconducting wire disposed adjacent to the first low-temperature superconducting wire, the second low-temperature superconducting wire including a second filament and a second stabilizing matrix encompassing the second filament, and
wherein the MIT material is in contact with the first stabilizing matrix and the second stabilizing matrix.

Assignees

• Keri Korea Electrotechnology Res Inst

Inventors

• Jo Young Sik
• Ko Rock Kil
• Kim Seog Whan
• Ha Dong Woo
• Kim Hyung Wook
• Doh Chil Hoon

Classifications

• H01F6/06

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

• H01B12/14 Primary

  characterised by the disposition of thermal insulation · CPC title

• H01B12/04 Primary

  Single wire · CPC title

• H01B1/02

  mainly consisting of metals or alloys · CPC title

• Y02E40/645

  Cross-Sectional Technologies · mapped topic