Oxide superconducting wire and method of manufacturing oxide superconducting wire

Patent metadata

Field	Value
Publication number	US-2016359097-A1
Application number	US-201515117502-A
Country	US
Kind code	A1
Filing date	May 7, 2015
Priority date	May 8, 2014
Publication date	Dec 8, 2016
Grant date	—

Abstract

An oxide superconducting wire of the invention includes a substrate, an intermediate layer which is laminated on a main surface of the substrate, has one or more layers having an orientation, and has one or more non-orientation regions extending in a longitudinal direction of the wire, and an oxide superconducting layer which is laminated on the intermediate layer, has a crystal orientation controlled by the intermediate layer, and has non-orientation regions located on the non-orientation regions in the intermediate layer and is formed into multiple filaments.

First claim

1 . An oxide superconducting wire formed into multiple filaments, comprising:
a substrate; an intermediate layer laminated on a main surface of the substrate, the intermediate layer having one or more layers having an orientation, the intermediate layer having one or more non-orientation regions extending in a longitudinal direction of the wire; and an oxide superconducting layer laminated on the intermediate layer, the oxide superconducting layer having a crystal orientation controlled by the intermediate layer, the oxide superconducting layer having non-orientation regions located on the non-orientation regions in the intermediate layer.

2 . The oxide superconducting wire according to claim 1 , further comprising:
orientation inhibition regions provided on the main surface of the substrate or a main surface of any layer of layers constituting the intermediate layer, wherein the orientation inhibition regions are regions that inhibit crystal orientations in layers laminated on the orientation inhibition regions and form the non-orientation regions.

3 . The oxide superconducting wire according to claim 2 , wherein
the orientation inhibition regions are recessed grooves formed on the main surface of the substrate or the main surface of any layer of the layers constituting the intermediate layer.

4 . The oxide superconducting wire according to claim 3 , wherein
the intermediate layer has an orientation layer and a cap layer laminated on the orientation layer, the oxide superconducting layer is laminated on the cap layer, and the recessed grooves is covered with the cap layer.

5 . The oxide superconducting wire according to claim 2 , wherein
the orientation inhibition regions are protruding stripe portions formed on the main surface of the substrate or the main surface of any layer of the layers constituting the intermediate layer.

6 . The oxide superconducting wire according to claim 2 , wherein
the orientation inhibition regions are rough surface portions formed on the main surface of the substrate or the main surface of any layer of the layers constituting the intermediate layer, and the rough surface portions are regions having a relatively greater arithmetic average roughness Ra than portions in which the rough surface portions are not formed.

7 . The oxide superconducting wire according to claim 6 , wherein
the arithmetic average roughness Ra of the rough surface portions is 5 nm to 1000 nm.

8 . A method of manufacturing an oxide superconducting wire, comprising:
preparing a substrate having a main surface; forming one or more orientation inhibition regions in a longitudinal direction of the wire on the main surface of the substrate; laminating an intermediate layer formed of one or more layers on the main surface of the substrate and the orientation inhibition regions after the orientation inhibition regions are formed; laminating an oxide superconducting layer having crystal orientations controlled by the intermediate layer on the intermediate layer; forming non-orientation regions in the oxide superconducting layer located on the orientation inhibition regions; and forming the oxide superconducting wire into multiple filaments.

9 . A method of manufacturing an oxide superconducting wire, comprising:
preparing a substrate having a main surface; laminating an intermediate layer formed of one or more layers on the main surface of the substrate; after any layer of the layers constituting the intermediate layer is laminated, forming one or more orientation inhibition regions in a longitudinal direction of the wire on the main surface of the laminated layer; laminating an oxide superconducting layer having crystal orientations controlled by the intermediate layer on the intermediate layer and the orientation inhibition regions; forming non-orientation regions in the oxide superconducting layer located on the orientation inhibition regions; and forming the oxide superconducting wire into multiple filaments.

10 . The method of manufacturing an oxide superconducting wire according to claim 8 , wherein
the orientation inhibition regions are recessed grooves, and the recessed grooves are formed on the main surface when forming the orientation inhibition regions.

11 . The method of manufacturing an oxide superconducting wire according to claim 10 , wherein
when forming the orientation inhibition regions, the recessed grooves are formed by pressing a processing tool onto the main surface and moving the wire in the longitudinal direction.

12 . The method of manufacturing an oxide superconducting wire according to claim 9 , wherein
the orientation inhibition regions are protruding stripe portions, and the protruding stripe portions are formed on the main surface when forming the orientation inhibition regions.

13 . The method of manufacturing an oxide superconducting wire according to claim 12 , wherein
when forming the orientation inhibition regions, the protruding stripe portions are formed by attaching a fixing agent to the main surface.

14 . The method of manufacturing an oxide superconducting wire according to claim 9 , wherein
the orientation inhibition regions are rough surface portions, and the rough surface portions are formed on the main surface when forming the orientation inhibition regions.

15 . The method of manufacturing an oxide superconducting wire according to claim 14 , wherein
when forming the orientation inhibition regions, the rough surface portions are formed by radiating laser light rays on the main surface.

16 . The method of manufacturing an oxide superconducting wire according to claim 9 , wherein
the orientation inhibition regions are recessed grooves, and the recessed grooves are formed on the main surface when forming the orientation inhibition regions.

17 . The method of manufacturing an oxide superconducting wire according to claim 16 , wherein
when forming the orientation inhibition regions, the recessed grooves are formed by pressing a processing tool onto the main surface and moving the wire in the longitudinal direction.

Assignees

• Fujikura Ltd

Inventors

• KURIHARA Chihaya

Classifications

• H01L39/128 Primary

  Electricity · mapped topic

• H01L39/2461

  Electricity · mapped topic

• H01B12/02

  characterised by their form · CPC title

• H10N60/858 Primary

  having multilayered structures, e.g. superlattices · CPC title

• H10N60/203 Primary

  comprising high-Tc ceramic materials · CPC title