A kind of preparation method of high-performance iron-based superconducting tape

An iron-based superconducting, high-performance technology, used in superconducting devices, superconducting/high-conducting conductors, metal processing equipment, etc., can solve the problems of difficult to generate texture and small anisotropy, and achieve critical current High density, high texture and good grain connectivity

Active Publication Date: 2022-04-26
FUJIAN NORMAL UNIV
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  • Claims
  • Application Information

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Problems solved by technology

However, for iron-based superconducting materials, due to its small anisotropy, it is difficult to generate texture by cold rolling, so its texture degree is increased, so that its critical current density is the current high-performance iron-based superconducting material. Technological Difficulties in the Preparation of Superconducting Strips

Method used

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  • A kind of preparation method of high-performance iron-based superconducting tape

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preparation example Construction

[0022] A kind of preparation method of high-performance iron-based superconducting tape of the present invention, it comprises the following steps:

[0023] Step 1: Making a multi-core precursor wire: mix the 122-phase superconductor powder and dopant, put it into an Ag tube, and process it into a single-core wire by drawing; cut the single-core wire into m sections of the same length, and put The obtained m single-core wires are bundled into a bundle and put into a metal-clad tube, and processed into multi-core wires through cold working methods such as circular die or roller die drawing and rolling, that is, iron-based superconducting multi-core wires are obtained. core precursor wire;

[0024] Step 2: Continuous hot rolling and quenching: the multi-core iron-based superconducting precursor wire obtained in step 1 is used in an online hot-rolling cooling device, and after multiple passes of continuous online hot-rolling and water-cooling quenching, the iron-based superconduc...

Embodiment 1

[0034] Step 1: Making the Multicore Prebody Wire

[0035] 50 g of Ba 0.6 K 0.4 Fe 2 As 2 Phase superconductor powder and 5 g of Sn powder (purity 99.9%) were fully mixed and put into the Ag tube, and the Ag / Ba 0.6 K 0.4 Fe 2 As 2 Drawing and processing into single-core wires; cut the single-core wires into 19 sections of the same length, put 19 single-core wires into a stainless steel tube with an outer diameter of 14 mm and a wall thickness of 1.0 mm, and draw and It was processed into iron-based superconducting multi-core precursor wire with a diameter of 1.0 mm by rolling and other methods.

[0036] Step 2: Continuous hot rolling and quenching

[0037] The iron-based superconducting multi-core precursor wire obtained in step 1 was used figure 1 In the device shown, according to the processing rate of 10% per pass, after multiple passes of continuous on-line hot rolling and water cooling and quenching, the maximum temperature of the strip during the on-line hot rol...

Embodiment 2

[0042] Step 1: Making the Multicore Prebody Wire

[0043] 100 g of Sr 0.6 K 0.4 Fe 2 As 2 Phase superconductor powder and 5 g of Sn powder (purity 99.9%) were fully mixed and put into Ag tube, and the Ag / Sr 0.6 K 0.4 Fe 2 As 2 Drawing and processing into a single-core wire; cut the single-core wire into 37 sections of the same length, put 37 single-core wires into a Ni tube with an outer diameter of 16 mm and a wall thickness of 1.0 mm, and draw and It was processed into iron-based superconducting multi-core precursor wire with a diameter of 2.0 mm by rolling and other methods.

[0044] Step 2: Continuous hot rolling and quenching

[0045] The iron-based superconducting multi-core precursor wire obtained in step 1 was used figure 1 The device shown, according to the processing rate of 50% per pass, after multiple passes of continuous on-line hot rolling and water-cooling quenching, the maximum temperature of the strip during the on-line hot rolling process is 950 ° C...

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Abstract

The invention discloses a method for preparing a high-performance iron-based superconducting strip. In the method, a multi-core precursor wire is firstly prepared, and then the wire is rolled by means of continuous online hot rolling and water-cooling quenching to obtain a highly textured and A multi-core precursor strip with good compactness is finally heat-treated and annealed to obtain the required high-performance iron-based superconducting strip. The method is simple, suitable for the preparation of industrial kilometer-level superconducting long ribbons, and is conducive to large-scale popularization and application, especially having great commercial value in the field of high-field superconducting magnets.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of high-temperature superconducting materials for applications in strong magnetic fields, and in particular relates to a preparation method of high-performance iron-based superconducting strips. Background technique [0002] Since Japanese scientists discovered iron-based high-temperature superconductors in 2008, the family of iron-based superconductors that have been discovered includes: R E (O,F)FeAs (1111 phase, R E = rare earth elements), M 1-x K x Fe 2 As 2 (122 phases, M =Ba or Sr), Fe(Se,Te) (11 phases), K x Fe 2-y Se 2 and (Li 1−x Fe x ) OHFeSe etc. Among them, the critical transition temperature of phase 122 superconductor T c Can reach 38 K, critical current density J c Over 1000 A / mm at 4.2 K, 10 T 2 , on-site magnetic field H c2 (0 K) over 100 T, small anisotropy (less than 2), and the wire ribbon can be prepared by a simple powder tube method, so it is c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B12/00H01B12/02C21D8/06C21D1/18C21D1/74B22F1/14B22F5/12
CPCB22F1/0003H01B12/00H01B12/02C21D8/065C21D1/18C21D1/74B22F5/12
Inventor 潘熙锋许涛赵勇
Owner FUJIAN NORMAL UNIV
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