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An iron-based compound superconducting joint and its preparation method

A superconducting joint, iron-based superconducting technology, applied in the usage of superconducting elements, manufacturing/processing of superconducting devices, superconducting devices, etc. The effect of high efficiency, simple preparation process and simplified experimental conditions

Active Publication Date: 2017-08-25
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the difficulty of making iron-based superconducting joints, propose a method for preparing iron-based superconducting joints with high connection efficiency, and prepare iron-based superconducting joints with high joint connection efficiency

Method used

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  • An iron-based compound superconducting joint and its preparation method
  • An iron-based compound superconducting joint and its preparation method
  • An iron-based compound superconducting joint and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The two chemical formulas that need to be connected are the same as ReMPnO 1-x f x The surface non-superconducting layer is peeled off at the end of the iron-based superconducting block to expose the superconducting core, wherein Re is La; M is Fe; Pn is As; x is 0.2. The iron-based superconductor contains a dopant Sn, and the mass ratio of Sn to the iron-based superconductor is 10%.

[0031] Put the iron-based superconducting block end and the iron-based superconducting powder treated above with a single-layer metal sheath according to figure 2 The parallel connection shown is wrapped, and the chemical formula of the iron-based superconducting powder is ReMPnO 1-x f x , where Re is La; M is Fe; Pn is As; x is 0.2. The iron-based superconductor contains a dopant Sn, and the mass ratio of Sn to the iron-based superconductor is 10%.

[0032] The metal sheath is selected as a metal tube, and the material is silver. The pressure applied to the above-mentioned envelop...

Embodiment 301

[0056] The two chemical formulas that need to be connected are the same as Ae 1-x A x m 2 Pn 2 And the end of the single-core iron-based superconducting tape is peeled off the surface non-superconducting layer, so that the superconducting core is exposed. Wherein Ae is Sr; A is K; M is Fe; Pn is As; x is 0.4. The iron-based superconductor contains dopants Sn, K and As, wherein the mass ratio of Sn to the iron-based superconductor is 5%; the mass ratio of K to the iron-based superconductor is 1.5%; the mass ratio of As to the iron-based superconductor is 3 %.

[0057] Put the iron-based superconducting tape end and iron-based superconducting powder treated above with a double-layer metal sheath according to figure 1 The straight line connection shown is welded, and the chemical formula of the iron-based superconducting powder is Ae 1-x A x m 2 Pn 2 , where Ae is Sr; A is K; M is Fe; Pn is As; x is 0.4. The iron-based superconductor contains dopants Sn, K and As, where...

Embodiment 706

[0086] The two chemical formulas that need to be connected are the same as Ae 1-x A x m 2 Pn 2 The end of the single-core iron-based superconducting tape is peeled off the surface non-superconducting layer to expose the superconducting core. Wherein Ae is Ba; A is K; M is Fe; Pn is As; x is 0.4. The iron-based superconductor contains dopants K and As, wherein the mass ratio of K to the iron-based superconductor is 1.4%; the mass ratio of As to the iron-based superconductor is 2.6%.

[0087] Put the iron-based superconducting tape end and iron-based superconducting powder treated above with a double-layer metal sheath according to figure 1 The connection method is welded, and the chemical formula of iron-based superconducting powder is Ae 1-x A x m 2 Pn 2 , where Ae is Ba; A is K; M is Fe; Pn is As; x is 0.4. The iron-based superconductor contains dopants K and As, wherein the mass ratio of K to the iron-based superconductor is 1.4%; the mass ratio of As to the iron-ba...

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Abstract

An iron-based compound superconducting joint, the superconducting joint includes a connected iron-based superconductor, iron-based superconducting powder and a metal sheath. The ends of the connected superconductors are filled with iron-based superconducting powder and wrapped by a single-layer or multi-layer metal sheath. The preparation steps of the superconducting joint are as follows: (1) peel off the non-superconducting layer on the surface of the iron-based superconductor end to be connected to expose the superconducting core; (2) remove the iron-based superconductor end treated in step (1) Fill the iron-based superconducting powder between them, and wrap the iron-based superconductor end and the iron-based superconducting powder with a metal sheath at the same time; (3) Welding step (2) The processed metal sheaths, or does not need to be welded; (4) Apply pressure , reducing the cross-section of the metal sheath prepared in the above step (3); (5) during or after applying pressure, the metal sheath prepared in the above step (4) is subjected to heat treatment, or heat treatment is not necessary. The invention is very suitable for making superconducting joints at engineering sites.

Description

technical field [0001] The invention relates to an iron-based compound superconducting joint and a preparation method thereof. Background technique [0002] Iron-based compound superconductor material is a newly discovered compound superconductor [Iron-based layered superconductor LaO 1-x f x FeAs(x=0.05-0.12) with T c =26 K.J.Am.Chem.Sco.130, 3296-3297 (2008)]. At present, its highest superconducting transition temperature has reached 55K, and it is likely to continue to increase. Compared with traditional low-temperature superconducting materials, iron-based superconductors have the advantages of high transition temperature, large upper critical field, and small dependence of critical current on strong magnetic field. 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-based superconductors have simpler crystal structures, larger coherence lengths, small...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F6/00H01F6/06H01R4/68H01L39/12H01L39/24H01B12/00
CPCH01R4/68H01B12/00H01F6/00H01F6/06H01F6/065H10N60/85H10N60/01Y02E40/60
Inventor 王栋樑马衍伟张现平姚超董持衡徐中堂
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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