公开(公告)号：EP4071769A1

公开(公告)日：2022-10-12

申请号：EP20895587.2

申请日：2020-12-04

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： ASAMI, Daisuke ,  KATAYAMA, Kota ,  SUGIMOTO, Masahiro ,  II, Hideki ,  SAKAMOTO, Hisaki ,  KATO, Tomoya

IPC: H01B13/00 ,  H01B12/04 ,  H01B12/10

Abstract: A precursor for Nb 3 Sn single-core superconducting wire includes: a Sn-based wire rod, a first Cu-based tube covering an outer circumferential surface of the Sn-based wire rod, an Nb-based tube covering an outer surface of the first Cu-based tube, and a second Cu-based tube covering an outer surface of the Nb-based tube, in which the Sn-based wire rod contains a matrix phase and at least one kind of hard phases that is harder than the matrix phase; and in a cross section parallel to a longitudinal direction of the precursor for Nb 3 Sn single-core superconducting wire, a maximum dimension of the hard phases in a width direction perpendicular to the longitudinal direction is 50% or less of a minimum dimension in the width direction of the Sn-based wire rod and/or is equal to or smaller than a minimum thickness in the width direction of the Nb-based tube.

公开(公告)号：EP3859755A1

公开(公告)日：2021-08-04

申请号：EP19867242.0

申请日：2019-09-20

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： SUGIMOTO, Masahiro ,  TSUBOUCHI, Hirokazu ,  KATAYAMA, Kota ,  II, Hideki

IPC: H01B12/10 ,  H01F6/06

Abstract: The present invention provides: an insulation-coated compound superconducting wire which has excellent superconducting characteristics, exhibits a tensile strength equal to or larger than that of the conventional compound superconducting wire at both room temperature and extremely low temperature, also has excellent winding property, and enables a superconducting coil to be commercially produced; and a rewinding method thereof. The insulation-coated compound superconducting wire 1 according to the present invention includes: a compound superconducting wire 10 having a compound superconducting part 11 which includes a first matrix 16 and a plurality of compound superconducting filaments 15 containing compound superconducting phases, a reinforcing part 12 which is disposed on the outer circumferential side of the compound superconducting part 11 and includes a plurality of reinforced filaments 18, a second matrix 19 and a second stabilizing material 20, and a stabilizing part 13 which is disposed on at least one side among the inner circumferential side and the outer circumferential side of the reinforcing part 12; and an electrical insulation part 30 which covers the outer circumferential surface of the compound superconducting wire 10, in which the insulation-coated compound superconducting wire 1 has a critical current value (Ic) larger than that of the compound superconducting wire 10 before being covered with the electrical insulation part 30.

公开(公告)号：EP4227427A1

公开(公告)日：2023-08-16

申请号：EP21877428.9

申请日：2021-09-29

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： SUGIMOTO, Masahiro ,  KATAYAMA, Kota ,  II, Hideki ,  KATO, Tomoya

IPC: C22C9/06 ,  C22C27/02 ,  H01B12/10 ,  H01F6/06

Abstract: A NbTi superconducting multicore wire includes:
a core portion;
a first barrier layer arranged around the circumference of the core portion and composed of a first copper alloy including at least one element selected from Ni or Mn;
a filament assembly arranged around the circumference of the first barrier layer and including a plurality of NbTi filament assemblies each including a plurality of NbTi filaments, the plurality of NbTi filaments being at least seven NbTi filaments, embedded in a matrix composed of a second copper alloy including at least one element selected from Ni or Mn;
a second barrier layer arranged around the circumference of the filament assembly and composed of the first copper alloy; and
a stabilizing layer arranged around the circumference of the second barrier layer and composed of a metal,
in a transverse cross section perpendicular to a longer direction, the plurality of NbTi filaments in each of the NbTi filament assemblies being arranged in one or more circular shapes each having a different diameter, centering on one NbTi filament; and a plurality of NbTi filaments arranged in a circular shape in an outermost circle being arranged at approximately equal intervals along a circumferential direction.

公开(公告)号：EP3007180B1

公开(公告)日：2018-04-04

申请号：EP14804085.0

申请日：2014-05-28

Applicant: Fujikura Ltd. ,  SWCC SHOWA CABLE SYSTEMS CO., LTD. ,  Furukawa Electric Co., Ltd.

Inventor： MACHI, Takato ,  YOSHIDA, Tomo ,  NAKAMURA, Tatsunori ,  KATAYAMA, Kota ,  NAKAO, Koichi ,  TANABE, Keiichi

IPC: H01B12/06 ,  H01L39/14 ,  H01L39/24

CPC classification number: H01B12/04 ,  H01B13/0009 ,  H01L39/143 ,  H01L39/2467 ,  H01L39/248

Abstract: An oxide superconductor includes: a substrate made of a metal; an insulating intermediate layer provided on the substrate; an oxide superconducting layer provided on the intermediate layer; a metal stabilizing layer provided on the oxide superconducting layer; and a plurality of dividing grooves which divide the metal stabilizing layer and the oxide superconducting layer along a longitudinal direction of the substrate, reach the inside of the intermediate layer through the oxide superconducting layer from the metal stabilizing layer, and do not reach the substrate. The metal stabilizing layer and the oxide superconducting layer are divided to form a plurality of filament conductors by the plurality of dividing grooves, and in each dividing groove of the plurality of dividing grooves, a width of a groove opening portion of the dividing groove is equal to or greater than a width of a groove bottom portion of the dividing groove.