US 11,837,380 B2
Superconducting wire rod, superconducting coil, magnetic generator, and method for producing superconducting wire rod
Takaaki Suzuki, Tokyo (JP); Hideki Tanaka, Tokyo (JP); and Motomune Kodama, Tokyo (JP)
Assigned to HITACHI, LTD., Tokyo (JP)
Appl. No. 17/053,839
Filed by HITACHI, LTD., Tokyo (JP)
PCT Filed Feb. 27, 2019, PCT No. PCT/JP2019/007702
§ 371(c)(1), (2) Date Nov. 9, 2020,
PCT Pub. No. WO2020/039623, PCT Pub. Date Feb. 27, 2020.
Claims priority of application No. 2018-156960 (JP), filed on Aug. 24, 2018.
Prior Publication US 2021/0233685 A1, Jul. 29, 2021
Int. Cl. H01B 12/08 (2006.01); H01F 6/06 (2006.01); H01F 6/00 (2006.01)
CPC H01B 12/08 (2013.01) [H01F 6/00 (2013.01); H01F 6/06 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A superconducting wire rod comprising:
a center material of which at least an outer circumferential surface is formed of a metal that does not react with Mg;
a plurality of monofilamentary wires arranged around the center material, the plurality of monofilamentary wires each including an MgB2 superconductor core material coated with a first coating material formed of a metal that does not react with Mg; and
an outer shell material disposed outside the plurality of monofilamentary wires,
wherein at least an inner circumferential surface of the outer shell material is formed of a metal that does not react with Mg,
wherein the center material is formed of a core formed of a metal capable of reacting with Mg and a second coating material formed of a metal that does not react with Mg and coating the core, or is formed of a metal that does not react with Mg, and
wherein a thickness of the first coating material is larger than a thickness of the second coating material.