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Preparation method and rolling device of iron-based superconducting long wire

An iron-based superconductor and iron-based superconductor technology, which is applied in metal rolling, metal rolling, superconducting devices, etc., can solve problems such as uneven critical current density, achieve consistent hot rolling effects, avoid heat conduction, The effect of improving transmission performance

Active Publication Date: 2020-07-10
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

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect of non-uniform critical current density along the length direction of the iron-based superconducting long wire in the prior art, thereby providing an iron Preparation method and rolling device of base superconducting long wire

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  • Preparation method and rolling device of iron-based superconducting long wire
  • Preparation method and rolling device of iron-based superconducting long wire
  • Preparation method and rolling device of iron-based superconducting long wire

Examples

Experimental program
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Effect test

Embodiment 1

[0058] A single core Ba 0.6 K 0.5 Fe 2 As 2 The preparation method of superconducting long wire, the steps are as follows:

[0059] (1) Under the atmosphere of argon gas, the metal barium chips, potassium blocks, iron powder and arsenic particles are accurately weighed according to the molar ratio Ba:K:Fe:As=0.6:0.5:2:2, and then put into the ball mill Ball milling in a tank to mix the powder evenly, heat-treating the ball-milled powder at 950°C and keeping it warm for 40 hours to obtain the iron-based superconductor precursor powder;

[0060] (2) Under an argon atmosphere, fill the iron-based superconductor precursor powder prepared in step (1) into a 0.45m long silver tube, the inner diameter of the silver tube is 5mm, the outer diameter is 8mm, and a copper plug is used Seal the two ends to obtain a tube-packing complex. In air, swage and draw the tube-packing complex to obtain a single-core iron-based superconductor precursor wire with a diameter of 1.9 mm;

[0061] (...

Embodiment 2

[0071] A 7 core Ba 0.6 K 0.4 Fe 2As 2 The preparation method of superconducting long wire, the steps are as follows:

[0072] (1) Under argon atmosphere, accurately weigh barium chips, potassium block, iron powder and arsenic particles according to the molar ratio Ba:K:Fe:As=0.6:0.4:2:2, and put them into the ball mill Ball milling in a tank to mix the powder evenly, heat-treating the ball-milled powder at a temperature of 900°C and keeping it warm for 60 hours to obtain the iron-based superconductor precursor powder;

[0073] (2) Under an argon atmosphere, fill the iron-based superconductor precursor powder prepared in step (1) into a 0.5m long silver tube, the inner diameter of the silver tube is 14mm, the outer diameter is 16mm, and a copper plug is used Seal both ends to obtain a tube-packing complex. In the air, swage and draw the tube-packing complex to obtain a single-core iron-based superconductor precursor wire with a length of 6.3 m and a diameter of 4.46 mm, whi...

Embodiment 3

[0085] A single core Ca 1.14 K 1.05 Fe 4 As 4 The preparation method of superconducting long wire, the steps are as follows:

[0086] (1) Under the atmosphere of argon gas, accurately weigh the metal calcium particles, potassium block, iron powder and arsenic particles according to the molar ratio Ca:K:Fe:As=1.14:1.05:4:4, and put them into the ball mill Ball milling in a tank to mix the powder evenly, heat-treating the ball-milled powder at a temperature of 910°C and keeping it warm for 40 hours to obtain the iron-based superconductor precursor powder;

[0087] (2) Under an argon atmosphere, fill the iron-based superconductor precursor powder prepared in step (1) into a 0.45m long silver tube, the inner diameter of the silver tube is 5mm, the outer diameter is 8mm, and a copper plug is used Seal the two ends, and then put it into a copper tube with an outer diameter of 10mm to obtain a tube-packed complex. In air, swage and pull the tube-packed complex to obtain a single-...

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Abstract

The invention provides a preparation method and a rolling device of an iron-based superconducting long wire. The preparation method of the iron-based superconducting long wire comprises the followingsteps: sequentially carrying out hot rolling, cooling and heat treatment on an iron-based superconductor precursor wire, and keeping the temperature of a roller and the temperature of the iron-based superconductor precursor wire consistent in the hot rolling process. The invention provides a preparation method of an iron-based superconducting long wire. The temperature of a roller and the temperature of an iron-based superconductor precursor wire rod are kept consistent in the rolling process; heat conduction between the roller and the iron-based superconductor precursor wire is avoided; constant-temperature rolling is achieved, it is guaranteed that the hot rolling effect of each point of the whole iron-based superconducting long line in the length direction is kept consistent, and therefore the uniformity of the critical current density of the iron-based superconducting long line in the length direction is guaranteed, and the overall transmission performance of the iron-based superconducting long line is further improved.

Description

technical field [0001] The invention relates to the field of iron-based superconductors, in particular to a preparation method and a rolling device for iron-based superconducting long wires. Background technique [0002] Iron-based superconducting materials have the advantages of high upper critical field, low anisotropy, high critical transmission current, low dependence on strong magnetic field, simple preparation process, etc., and are considered by "Science" magazine to be the new type of high-temperature superconductor with the most development potential at present. It has strong application potential in the fields of next-generation high-field nuclear magnetic resonance imaging (MRI), superconducting energy storage system (SMES), nuclear magnetic resonance spectrometer (NMR), future high-energy particle accelerators, and controllable nuclear fusion devices. [0003] The successful preparation of highly uniform and high-performance superconducting long wires is a prereq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B12/00B22F9/04B22F1/00B22F3/24B22F3/18C21D8/06B21B1/18B21B27/10B21B45/02
CPCH01B13/0016H01B12/00B22F9/04B22F3/24B22F3/18C21D8/065B21B1/18B21B27/106B21B45/0209B22F2009/043B22F2003/248B22F2003/185B21B2045/0212B22F1/142Y02E40/60
Inventor 王栋樑马衍伟张现平朱炎昌
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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