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Superconductive wire rod and preparation method thereof

A technology of superconducting wire and superconducting layer, which is applied in the usage of superconducting elements, superconducting devices, superconducting/high-conducting conductors, etc., which can solve the problems of increased contact resistance at welding parts and reduced welding strength

Active Publication Date: 2015-08-19
富通集团(天津)超导技术应用有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the superconducting wire and the electrode are welded in the state where the surface contains copper oxide, not only will the welding strength decrease, but also the contact resistance of the welding part will increase.

Method used

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  • Superconductive wire rod and preparation method thereof
  • Superconductive wire rod and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] On a Ni alloy substrate (Hastelloy (registered trademark) strip) sequentially use the sputtering method to form Al 2 o 3 layer, sputtering method to form Y 2 o 3 layer, IBAD method to form MgO layer, sputtering method to form LaMnO 3 layer and sputtering method to form CeO 2 layer; in CeO 2 A YBaCuO superconducting layer is formed on the layer by a MOD method; an Ag layer is formed by a sputtering method to form a superconducting wire with an Ag layer structure.

[0050] The wire is immersed in 20°C, 5mL / L sulfuric acid solution for 10s, and then washed with water for 10s; the washed superconducting wire is used as a cathode for electroplating in an aqueous copper sulfate solution to form a 15 μm thick Cu layer on the Ag layer, The copper sulfate aqueous solution includes 200g / L copper sulfate pentahydrate, 80g / L sulfuric acid, 300ppm potassium chloride, 0.3g / L polyethylene glycol and 0.05g / L sodium lauryl sulfate, the copper sulfate aqueous solution The temperatu...

Embodiment 2

[0053] The method prepared in Example 1 is used to prepare the superconducting wire, the difference is that the Cu-plated superconducting wire is immersed in a glycerin solution with a temperature of 20 ° C and a concentration of 1 ml / L for 2 minutes to coat the surface of the superconducting wire to form an anti-oxidation Floor.

[0054] The superconducting wire with an anti-oxidation layer formed on the surface is welded to the electrode, and the welding resistance and welding strength of the welded part are measured. The results are shown in Table 1. Table 1 is the performance test of the superconducting wire provided by the embodiment of the present invention after welding. result.

Embodiment 3

[0056] The method prepared in Example 1 is used to prepare the superconducting wire, the difference is that the Cu-plated superconducting wire is immersed in a diethanolamine solution with a temperature of 20°C and a concentration of 0.5ml / L for 2 minutes to coat the surface of the superconducting wire to form a superconducting wire. Antioxidant layer.

[0057] The superconducting wire with an anti-oxidation layer formed on the surface is welded to the electrode, and the welding resistance and welding strength of the welded part are measured. The results are shown in Table 1. Table 1 is the performance test of the superconducting wire provided by the embodiment of the present invention after welding. result.

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Abstract

Provided in the invention is a superconductive wire rod comprising a substrate, an interlayer formed on the substrate, a superconductive layer formed on the interlayer, a Ag layer formed on the superconductive layer, a Cu layer formed on the Ag layer, and an anti-oxidation layer formed on the Cu layer. The anti-oxidation layer is in a liquid or solid state under a normal temperature and is converted into a gaseous state under a welding temperature. In addition, the invention also provides a preparation method of the superconductive wire rod. Under a normal temperature, the Cu of the wire rod is protected by the anti-oxidation layer; and the Cu layer is not oxidized and no copper oxide is generated during the long-time transport and storage process. When the superconductive wire rod and an electrode is welded, the anti-oxidation layer on the Cu layer is converted into one in a gaseous state under a welding temperature and thus the Cu layer is exposed, thereby realizing welding of the Cu and the electrode. Therefore, the welding intensity is not reduced; the welding part resistance is not increased; and the degradation of the superconductive wire rod is not influenced.

Description

technical field [0001] The invention belongs to the technical field of superconducting wires, in particular to a superconducting wire and a preparation method thereof. Background technique [0002] Superconducting materials are materials that exhibit the property of zero resistance under certain low temperature conditions, and are widely used in the production of magnets and power cables. [0003] With the development of superconducting materials, the second-generation superconducting wires appear. Its typical structure consists of a substrate, a buffer layer, a superconducting layer and a stabilization layer. Among them, the substrate is the support of the entire superconducting wire; the buffer layer and It is called the middle layer, and its role is to provide texture for the growth of the superconducting layer; the superconducting layer is formed of superconducting materials and is the carrier of current; the stabilization layer is also called the stable layer, and its r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B12/06H01B13/00H01B13/22
CPCY02E40/60
Inventor 王醒东叶新羽林中山高琳夏芳敏张立永青木裕治长谷川隆代
Owner 富通集团(天津)超导技术应用有限公司
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