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A kind of iron-based superconducting joint and preparation method thereof

An iron-based superconductor and iron-based superconductor technology, which is applied in the direction of connecting contact materials, superconducting magnets/coils, and completing connection and connection by deformation, can solve the problems of loss of doping elements, affecting the efficiency of superconducting connection, etc. The effect of improving microcracks, improving superconducting connection efficiency and avoiding brittle fracture

Active Publication Date: 2020-08-11
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Therefore, the purpose of the present invention is to solve the technical problem that the loss of doping elements in the connection area of ​​the iron-based superconducting joint obtained by the preparation method of the iron-based superconducting joint in the prior art affects the efficiency of the superconducting connection, thereby providing an iron-based superconducting joint. Superconducting joint and its preparation method

Method used

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  • A kind of iron-based superconducting joint and preparation method thereof
  • A kind of iron-based superconducting joint and preparation method thereof
  • A kind of iron-based superconducting joint and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Sr 0.6 K 0.48 Fe 2 As 2 (122 system) The preparation method of iron-based superconducting joint, comprises the following steps:

[0035] A pretreatment step, using mechanical methods to remove the non-superconducting layer at the end of the iron-based superconductor to be connected, so that the superconducting core is exposed;

[0036] In the connection step, the precursor powder is filled between the superconducting cores obtained in the pretreatment step for connection, and the connection area is wrapped with a metal sheath. The specific operation is as follows: figure 1 shown;

[0037] The heat treatment step is to carry out heat treatment to the connection area, and the temperature change process of the heat treatment is as follows: figure 2 Shown (A-B warming up to T 1 , 1 hour; B-C warms up to T 2 , 1.5 hours; C-D keep warm for 1 hour; D-E cool down to T 1 , 1 hour; E-F insulation 2 hours; F-G down to room temperature, 1 hour, wherein, T 1 =600°C, T 2 =...

Embodiment 2

[0040] Sr 0.6 K 0.48 Fe 2 As 2 (122 system) The preparation method of iron-based superconducting joint, comprises the following steps:

[0041]A pretreatment step, using mechanical methods to remove the non-superconducting layer at the end of the iron-based superconductor to be connected, so that the superconducting core is exposed;

[0042] In the connection step, the precursor powder is filled between the superconducting cores obtained in the pretreatment step for connection, and the connection area is wrapped with a metal sheath. The specific operation is as follows: figure 1 shown;

[0043] In the heat treatment step, heat treatment is carried out to the connection area, the temperature change process of the heat treatment is the same as that in Example 1, and the heat treatment process is a protective atmosphere;

[0044] The pressurization step is the same as the analysis result in Example 1. During the heat treatment, when the temperature is higher than 791° C., th...

Embodiment 3

[0046] Sr 0.6 K 0.48 Fe 2 As 2 (122 system) The preparation method of iron-based superconducting joint, comprises the following steps:

[0047] A pretreatment step, using mechanical methods to remove the non-superconducting layer at the end of the iron-based superconductor to be connected, so that the superconducting core is exposed;

[0048] In the connection step, the precursor powder is filled between the superconducting cores obtained in the pretreatment step for connection, and the connection area is wrapped with a metal sheath. The specific operation is as follows: figure 1 shown;

[0049] In the heat treatment step, heat treatment is carried out to the connection area, the temperature change process of the heat treatment is the same as that in Example 1, and the heat treatment process is a protective atmosphere;

[0050] The pressurization step is the same as the analysis result in Example 1. During the heat treatment, when the temperature is higher than 791° C., t...

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Abstract

The invention discloses an iron-based superconduction connector and a fabrication method thereof. The fabrication method of the iron-based superconduction connector comprises the steps of stripping atail end of the iron-based superconductor to expose a superconduction core, connecting the superconduction core, wrapping a connection region, performing thermal processing on the connection region, and applying pressure to the connection region. In the step of thermal processing on the connection region, the connection region is arranged in a pressure-applying state within a range larger than a preset temperature, and the preset temperature is a run-off temperature of a doping component in the iron-based superconductor. The connection region is enabled to be in the pressure-applying state within the range which the thermal processing temperature is larger than the run-off temperature of the doping element in the iron-based superconductor in the step of thermal processing on the connectionregion, volatilization of the doping element of the connection region caused by that the temperature is raised and exceeds the preset temperature during the thermal processing process is prevented, the run-off condition of the doping element of the connection region is favorably controlled, and the superconduction connection efficiency is improved.

Description

technical field [0001] The invention relates to the field of superconductor materials, in particular to an iron-based superconducting joint and a preparation method thereof. Background technique [0002] The iron-based superconductor refers to a material that contains iron in a compound, has a superconducting phenomenon at a low temperature, and iron acts as a main body for forming a superconductor. Iron-based superconductors include ReFeAsO (Re = rare earth element) (1111 system), AFe 2 As 2 (A=K, Sr, Ba, etc.) (122 system), LiFeAs (111 system) and FeSe (11 system), etc. Compared with traditional low-temperature superconducting materials, iron-based superconductors have the advantages of high transition temperature, large upper critical field, strong critical current, and small magnetic field dependence. It is a new superconductor with great application prospects in the range of 20-50K. guide material. Compared with oxide high-temperature superconducting materials, iron...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01R4/68H01R43/04H01F6/06C21D8/00
CPCC21D8/005H01F6/065H01R4/68H01R43/04
Inventor 朱炎昌马衍伟王栋樑
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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