Method for manufacturing superconducting wire, and superconducting wire

Patent metadata

Field	Value
Publication number	US-9558873-B2
Application number	US-201214376325-A
Country	US
Kind code	B2
Filing date	Feb 1, 2012
Priority date	Feb 1, 2012
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

A method for manufacturing a superconducting wire material in which the superconducting current is not saturated even when a superconducting layer is made into a thick film, and a superconducting wire material. In the method a superconducting layer is formed on a metal substrate interposed by an intermediate layer, the method including heating the metal substrate up to the film-formation temperature of a superconducting film for forming the superconducting layer, forming a superconducting film having a film thickness of at least 10 nm and no more than 200 nm on the intermediate layer, and reducing the metal substrate temperature to a level below the film-formation temperature of the superconducting film, and the superconducting film-formation, including the heating, the film-formation, and the cooling, are performed a plurality of times.

First claim

The invention claimed is:

1. A method for manufacturing a superconducting wire in which a superconducting layer is formed above a metallic substrate with an intermediate layer in between, the method comprising:
heating the metallic substrate to a film deposition temperature of a superconducting thin film which forms the superconducting layer;
depositing the superconducting thin film with a thickness of 10-50 nm on the intermediate layer; and
cooling the metallic substrate temperature below the film deposition temperature of the superconducting thin film,
wherein forming the superconducting thin film which includes the heating, the depositing, and the cooling is performed plural times.

2. The method for manufacturing the superconducting wire according to claim 1 , wherein a temperature of heating the metallic substrate in the heating is 700-900° C.

3. The method for manufacturing the superconducting wire according to claim 1 , wherein the superconducting thin film is formed by Metal Organic Chemical Vapor Deposition.

4. The method for manufacturing the superconducting wire according of claim 1 , wherein the superconducting layer becomes 0.5 μm to 5.0 μm by performing the forming of the superconducting thin film plural times.

5. The method for manufacturing the superconducting wire according to claim 1 , wherein the metallic substrate is non-oriented.

Assignees

• Nakasaki Ryusuke
• Nakai Akinobu
• Watanabe Tomonori
• Kashima Naoji
• Nagaya Shigeo
• Furukawa Electric Co Ltd
• Chubu Electric Power Company Incorporated

Inventors

• Nakasaki Ryusuke
• Nakai Akinobu
• Watanabe Tomonori
• Kashima Naoji
• Nagaya Shigeo

Classifications

• H01F41/048

  Superconductive coils · CPC title

• H01F6/06 Primary

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

• H01B12/06

  Films or wires on bases or cores · CPC title

• H01L39/143

  Electricity · mapped topic

• H01L39/2441

  Electricity · mapped topic