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Connecting method of second-generation high-temperature superconducting tape and superconducting wire

A technology of high-temperature superconducting tape and connection method, which is applied in the usage of superconducting elements, conductive connection, superconducting/high-conducting conductor, etc., can solve the problems of poor mechanical properties of superconducting joints, etc. Effect of time, high mechanical strength

Active Publication Date: 2020-05-05
EASTERN SUPERCONDUCTOR SCI & TECH SUZHOU CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the structure of the superconducting layer needs to be destroyed to provide oxygen diffusion channels and the mechanical properties of the superconducting joint prepared purely by connecting the superconducting layer are poor, so as to provide a The connection method of the second generation high temperature superconducting tape

Method used

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  • Connecting method of second-generation high-temperature superconducting tape and superconducting wire
  • Connecting method of second-generation high-temperature superconducting tape and superconducting wire
  • Connecting method of second-generation high-temperature superconducting tape and superconducting wire

Examples

Experimental program
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Effect test

Embodiment 1

[0041] a. Remove the silver layer in some areas: Clean the oil on the surface of the area to be connected of two yttrium barium copper oxide (YBCO) superconducting strips with acetone, apply photoresist, and perform pre-baking, exposure, development, cleaning and post-baking Afterwards, immerse in the silver etchant to remove the silver layer in the specified area, then remove the residual photoresist and dry it, so that the remaining silver layer in the area to be connected is evenly distributed and a striped pattern in which the silver layer and the superconducting layer are spaced apart from each other is obtained.

[0042] b. Diffusion welding of the silver layer in the remaining part of the area: after the remaining silver layers in the area to be connected of the two yttrium barium copper oxide (YBCO) superconducting strips processed in step a are overlapped and overlapped, the two sides of the overlapped portion are overlapped. The inside and outside are respectively cla...

Embodiment 2

[0051] a. Remove the silver layer in some areas: Clean the oil on the surface of the area to be connected of two yttrium barium copper oxide (YBCO) superconducting strips with acetone, apply photoresist, and perform pre-baking, exposure, development, cleaning and post-baking Afterwards, immerse in the silver etchant to remove the silver layer in the specified area, then remove the residual photoresist and dry it, so that the remaining silver layer in the area to be connected is evenly distributed and a striped pattern in which the silver layer and the superconducting layer are spaced apart from each other is obtained.

[0052] b. Diffusion welding of the silver layer in the remaining part of the area: after the remaining silver layers in the area to be connected of the two yttrium barium copper oxide (YBCO) superconducting strips processed in step a are overlapped and overlapped, the two sides of the overlapped portion are overlapped. The inside and outside are respectively cla...

Embodiment 3

[0059] a. Remove the silver layer in some areas: Clean the surface oil stains in the area to be connected of two yttrium gadolinium barium copper oxide (YGdBCO) superconducting strips with acetone, and then apply photoresist. After pre-baking, exposure, development, cleaning and post-baking After baking, immerse in the silver etchant to remove the silver layer in the specified area, and then remove the residual photoresist and dry it, so that the remaining silver layer in the area to be connected is evenly distributed and a stripe pattern in which the silver layer and the superconducting layer are spaced apart is obtained.

[0060] b. Diffusion welding of the silver layer in the remaining part area: after the remaining silver layers in the area to be connected of the two yttrium gadolinium barium copper oxide (YGdBCO) superconducting strips processed in step a are superimposed and lapped, on both sides of the lapped part From the inside to the outside, silver foil, aluminum nit...

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Abstract

The invention relates to a connecting method of a second-generation high-temperature superconducting tape and a superconducting wire. The connecting method comprises the following steps: removing a protection layer: removing a silver layer of a part of a to-be-connected region of the second-generation high-temperature superconducting tape, and enabling the remaining silver layer and the exposed superconducting layer to be distributed at intervals; carrying out silver layer diffusion welding: making every two to-be-connected regions of at least two second-generation high-temperature superconducting tapes processed through the protection layer removing step in lap joint to form a lap joint area, making the remaining silver layers make contact in an overlapped mode, then, clamping the lap joint areas, and carrying out diffusion welding on the silver layers; performing fusion diffusion welding on the superconducting layer; and carrying out superconductivity recovery. According to the method, the structure of the superconducting layer is not damaged, meanwhile, an oxygen diffusion channel can be provided; the prepared superconducting joint has the superconducting characteristic in a liquid nitrogen temperature zone and also has high mechanical strength, and meanwhile, current can pass through the residual silver layer, so that the superconducting joint further has certain quench protection capacity.

Description

technical field [0001] The invention relates to the field of superconducting engineering, in particular to a connection method of second-generation high-temperature superconducting strips and a superconducting wire. Background technique [0002] The second-generation high-temperature superconducting materials have excellent comprehensive properties (the irreversible field reaches 7T at 77K, and the critical current density under the self-field reaches 10 6 A / cm 2 ), which can fully meet the application in the field of strong electricity in the liquid nitrogen temperature zone and strong magnetic field, and greatly promote the practical application of superconducting power technology. Many superconducting devices based on second-generation high-temperature superconducting tapes are also being developed continuously. Very long superconducting wires are often required in these superconducting devices, especially in the development process of large and medium-sized magnets, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R4/02H01B12/00
CPCH01B12/00H01R4/029Y02E40/60
Inventor 黄大兴丁发柱古宏伟商红静谢波玮李太广邹琦蔡渊莫思铭
Owner EASTERN SUPERCONDUCTOR SCI & TECH SUZHOU CO LTD
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