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Method for manufacturing low-resistance superconducting joint with high shielding characteristic

A manufacturing method and technology of superconducting joints, applied in the manufacture/processing of superconducting devices, superconducting devices, superconducting components, etc., can solve problems such as insufficient resistance and poor shielding of joints, and achieve high shielding performance Effect

Active Publication Date: 2010-08-04
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of poor shielding and low resistance of joints made by existing processes, the present invention proposes a method for making a joint for niobium-titanium-copper (NbTi / Cu) multifilament superconducting wires

Method used

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  • Method for manufacturing low-resistance superconducting joint with high shielding characteristic
  • Method for manufacturing low-resistance superconducting joint with high shielding characteristic
  • Method for manufacturing low-resistance superconducting joint with high shielding characteristic

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Embodiment Construction

[0016] Further illustrate the present invention below in conjunction with accompanying drawing and embodiment.

[0017] Such as figure 1 As shown, the copper 2 on the outer surface of the end of the NbTi / Cu superconducting wire 1 is etched with a mixed solution of nitric acid and sulfuric acid, and the length of the etched part of the NbTi / Cu superconducting wire 1 is 3-6 cm. After the etching is completed, the copper 2 is etched, leaving a plurality of NbTi superconducting wires 3 . Then the NbTi superconducting wire 3 was washed in deionized water.

[0018] figure 2 Shown is a Nb / NbTi / Cu multilayer composite rod 4 . The Nb / NbTi / Cu multilayer composite rod 4 consists of a niobium layer 5, a niobium-titanium layer 6 and a high-purity oxygen-free copper layer 7 from the inner layer to the outer layer. Among them, the niobium-titanium layer 6 can be used for magnetic field shielding, and the high-purity oxygen-free copper layer 7 is a stable base material for realizing a su...

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Abstract

The invention relates to a low-resistance superconducting joint with a high shielding characteristic, which is manufactured by a method comprising the following steps of: corroding copper (2) on the outer surfaces of the end parts of NbTi / Cu superconducting lines (1) to form NbTi superconducting lines (3); inserting the same amount of the NbTi superconducting lines (3) into each through hole (8) of a niobium layer (5) of a Nb / NbTi / Cu multilayer composite rod (4) respectively; exerting certain pressure to the outside of the Nb / NbTi / Cu multilayer composite rod (4) to ensure that the Nb / NbTi / Cu multilayer composite rod (4) is combined together with the NbTi superconducting lines (3) by pressure to form a joint; inserting the joint into a YBCO tube (9); and filling a molten woods metal solder (10) into the YBCO tube (9) to obtain the high-shielding low-resistance superconducting joint.

Description

technical field [0001] The invention relates to a manufacturing method of a superconducting joint, in particular to a manufacturing method of a superconducting joint used for a high magnetic field superconducting magnet. Background technique [0002] The low-resistance superconducting joint is the key technology to develop a high-stability and high-field superconducting magnet system. This magnet system is mainly used in scientific instruments, medical diagnosis, special electrical equipment and other occasions. Generally, due to the special application requirements of high magnetic field scientific instruments, the joint resistance of superconducting wires is less than 10 -13 ohms to 10 -14 ohm. Low superconducting wire joint resistance is an important means to realize high stable magnetic field of superconducting scientific instruments. Therefore, it is necessary to develop a special joint preparation process to achieve the stability of the magnetic field, so as to rea...

Claims

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Application Information

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IPC IPC(8): H01F6/06H01B12/00H01L39/24
CPCH01F6/065H01L39/02Y10T29/49201Y10T29/49014Y10T29/49194H10N60/80
Inventor 王秋良胡新宁宋守森丁立健严陆光
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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