Iron-based compound superconducting joint and preparation method thereof

A technology of superconducting joints and iron-based superconducting, applied in the usage of superconducting elements, manufacturing/processing of superconducting devices, superconducting devices, etc., can solve the problems of difficulty in making iron-based superconducting joints, and achieve joint connection The effect of high efficiency, simple preparation process and simplified experimental conditions

Active Publication Date: 2016-02-24
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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  • Iron-based compound superconducting joint and preparation method thereof
  • Iron-based compound superconducting joint and preparation method thereof
  • Iron-based compound superconducting joint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 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%.

[0030] 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%.

[0031] The metal sheath is selected as a metal tube, and the material is silver. The pressure applied to the above-mentioned envelop...

Embodiment 301

[0055] 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 %.

[0056] 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

[0085] 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%.

[0086] 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

Provided is an iron-based compound superconducting joint. The superconducting joint comprises connected iron-based superconductors, iron-based superconducting powder and a metal sheath. The position between tail ends of the connected iron-based superconductors is filled up with iron-based superconducting powder and wrapped up by a signal-layer or multi-layer metal sheath. The preparation method of the superconducting joint comprises following steps of: (1) peeling non-superconducting layers on surfaces of tail ends of the iron-based superconductors needed to be connected to expose superconducting cores; (2) filling iron-based superconducting powder between tail ends of processed tail ends of the iron-based superconductors and utilizing the multi-layer metal sheath to wrap up tail ends of the iron-based superconductors and the iron-based superconducting powder; (3) welding or not welding the metal sheath processed by the step (2); (4) applying pressure to shrink crease the cross section of the metal sheath prepared by the step (3); and (5) carrying out heat treatment on the metal sheath prepared by the step (4) during or after pressure is applied or not necessarily performing heat treatment.The invention is very suitable for making a superconducting joint in the engineering field.

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-basedlayeredsuperconductorLaO 1-x f x FeAs(x=0.05-0.12)withT 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, smaller an...

Claims

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Application Information

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Patent Type & Authority Applications(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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