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A kind of superconducting wire and its preparation method

A superconducting wire and wire technology, applied in the usage of superconducting elements, superconducting devices, superconducting/high-conducting conductors, etc., can solve the problem that the rich elements of superconducting wire cannot be removed, and achieve the effect of improving the practical potential.

Active Publication Date: 2022-01-07
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] Therefore, the technical problem to be solved by the present invention is to overcome the method in the prior art that cannot remove the rich elements in the superconducting wire, so as to provide a superconducting wire

Method used

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  • A kind of superconducting wire and its preparation method
  • A kind of superconducting wire and its preparation method
  • A kind of superconducting wire and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as figure 1 As shown, a superconducting wire includes a single-core wire and a first metal tube 1 covering the single-core wire. The wall of the first metal tube 1 is provided with a The opening 2 of the pipe wall of the first metal pipe 1 .

[0045] Such as figure 2 As shown, the opening 2 is a slit with a uniform gap width.

[0046] As another implementation mode of this embodiment, such as image 3 As shown, a superconducting wire includes 7 single-core wires and a first metal tube 1 covering the 7 single-core wires. The wall of the first metal tube 1 is provided with a The opening 2 of the pipe wall of the first metal pipe 1 .

[0047] The single-core wire includes a second metal tube 3 and a precursor powder 4 placed in the second metal tube 3 , and the mechanical strength of the first metal tube 1 is greater than that of the second metal tube 3 .

[0048] When the superconducting wire with this structure is heat-treated, the rich elements in the superco...

Embodiment 2

[0051] This embodiment provides a 7-core Ba 0.6 K 0.4 Fe 2 As 2 Superconducting wire rod and preparation method thereof, the specific steps are as follows:

[0052] Preparation of precursor powder: under argon atmosphere, metal barium chips (mass purity is 99.50%), potassium block (mass purity is 99.95%), iron powder (mass purity is 99.99%) and arsenic particles (mass purity is 99.95%) %), after accurately weighing according to the molar ratio Ba:K:Fe:As=0.6:0.5:2:2, put into a ball mill jar and ball mill for 10 hours. Put the ball-milled powder into the Nb tube, seal both ends with copper plugs, and then heat-treat at 900°C for 50 hours to obtain the precursor powder for superconducting wire;

[0053] Single-core drawing: fill the prepared precursor powder into a silver-tin alloy tube with an inner diameter of 5cm, an outer diameter of 8cm, and a length of 10cm; then seal both ends with Nb plugs to obtain a silver-tin alloy tube composite; The tube-packing composites wer...

Embodiment 3

[0059] This embodiment provides a 1 core Ba 0.6 K 0.4 Fe 2 As 2 Superconducting wire rod and preparation method thereof, the specific steps are as follows:

[0060] Preparation of precursor powder: under argon atmosphere, metal barium chips (mass purity is 99.50%), potassium block (mass purity is 99.95%), iron powder (mass purity is 99.99%) and arsenic particles (mass purity is 99.95%) %), after accurately weighing according to the molar ratio Ba:K:Fe:As=0.6:0.5:2:2, put into a ball mill jar and ball mill for 10 hours. Put the ball-milled powder into the Nb tube, seal both ends with copper plugs, and then conduct heat treatment. The temperature of the heat treatment is 1300 ° C, and the temperature is kept for 0.1 hour to obtain the precursor powder for preparing superconducting wires;

[0061] Single-core drawing: fill the prepared precursor powder into a silver-tin alloy tube with an inner diameter of 5cm, an outer diameter of 8cm, and a length of 10cm; then seal both en...

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Abstract

The invention provides a superconducting wire and a preparation method thereof. The superconducting wire includes a single-core wire and a first metal tube covering the single-core wire. The opening on the wall of the first metal pipe. Since there is an opening on the wall of the first metal tube, the rich elements escaped from the single-core wire can escape out of the first metal tube through the opening, so that the superconducting wire will not become superfluous due to the rich elements during heat treatment. The gaseous state increases the vapor pressure between the first metal tube and the single-core wire, so as not to form bubbles between the surface of the first metal tube and the single-core wire, which will affect the performance of the superconducting wire.

Description

technical field [0001] The invention relates to the technical field of superconducting material processing engineering, in particular to a superconducting wire and a preparation method thereof. Background technique [0002] In 2006, Professor Hideo Hosono of Tokyo Institute of Technology discovered iron-based superconductors, which contain iron and have superconductivity at low temperatures. Compared with oxide high-temperature superconducting materials, iron-based superconductors have simple crystal structure, large coherence length, small anisotropy, high critical magnetic field, and low material cost. Therefore, iron-based superconductors have great application advantages in the field of strong magnetic fields. It has received extensive attention from the international superconducting community. At present, the critical transport current density of this type of iron-based superconductor has exceeded 10 5 A / cm 2 [Realization of practical level current densities in S r0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B12/04H01B13/00
CPCH01B12/04H01B13/00Y02E40/60
Inventor 张现平马衍伟王栋樑姚超董持衡徐中堂黄河
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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