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A preparation method of bi-2223 multi-core superconducting tape

A bi-2223, superconducting tape technology, applied in the use of superconducting elements, superconducting devices, superconducting/high-conducting conductors, etc., can solve the problems of bubbling, expensive high-voltage equipment, and lack of manufacturing equipment, etc. To achieve the effect of simplifying the preparation process, improving the uniformity of the current carrying, and improving the density

Active Publication Date: 2017-05-31
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Even if choosing a reasonable heat treatment system can greatly reduce the C content in the powder, but in the later tube loading process, due to the high activity of the powder, it is easy to absorb H in the air. 2 O and CO 2 gas, causing eventual bubbling to occur
The use of high-pressure heat treatment can largely suppress the occurrence of bubbling, but suitable high-pressure equipment is very expensive. At present, only Sumitomo Corporation of Japan has this type of equipment, and due to technical confidentiality reasons, the country may not yet have the ability to manufacture such equipment.

Method used

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  • A preparation method of bi-2223 multi-core superconducting tape
  • A preparation method of bi-2223 multi-core superconducting tape
  • A preparation method of bi-2223 multi-core superconducting tape

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Experimental program
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Effect test

Embodiment Bi-2223

[0027] The preparation method of the present embodiment Bi-2223 multi-core superconducting tape comprises the following steps:

[0028] Step 1. The Bi-2223 precursor powder prepared by co-precipitation method is subjected to high-temperature heat treatment under the protection condition of mixed gas; the mixed gas is composed of high-purity argon and high-purity hydrogen, and the volume percentage of high-purity argon is 99.5%, the temperature of the high-temperature heat treatment is 600°C, the holding time is 1h, and the heating rate is 200°C / h; the mass purity of the high-purity argon and high-purity hydrogen is not less than 99.99%;

[0029] Step 2, place the vibrating table, silver bag and metal funnel in a glove box full of high-purity oxygen, install the silver bag on the vibrating table, fix the metal funnel on the silver bag and make the metal The lower end of the funnel is located in the silver sheath, and then the Bi-2223 precursor powder after the high-temperature ...

Embodiment 2

[0034] The preparation method of the present embodiment Bi-2223 multi-core superconducting tape comprises the following steps:

[0035]Step 1. The Bi-2223 precursor powder prepared by co-precipitation method is subjected to high-temperature heat treatment under the protection condition of mixed gas; the mixed gas is composed of high-purity argon and high-purity hydrogen, and the volume percentage of high-purity argon is 97%, the temperature of the high-temperature heat treatment is 500°C, the holding time is 2.5h, and the heating rate is 200°C / h; the mass purity of the high-purity argon and high-purity hydrogen is not less than 99.99%;

[0036] Step 2, place the vibrating table, silver bag and metal funnel in a glove box full of high-purity oxygen, install the silver bag on the vibrating table, fix the metal funnel on the silver bag and make the metal The lower end of the funnel is located in the silver sheath, and then the Bi-2223 precursor powder after the high-temperature h...

Embodiment 3

[0041] The preparation method of the present embodiment Bi-2223 multi-core superconducting tape comprises the following steps:

[0042] Step 1. The Bi-2223 precursor powder prepared by co-precipitation method is subjected to high-temperature heat treatment under the protection condition of mixed gas; the mixed gas is composed of high-purity argon and high-purity hydrogen, and the volume percentage of high-purity argon is 98.7%, the temperature of the high-temperature heat treatment is 550°C, the holding time is 3h, and the heating rate is 180°C / h; the mass purity of the high-purity argon and high-purity hydrogen is not less than 99.99%;

[0043] Step 2, place the vibrating table, silver bag and metal funnel in a glove box full of high-purity oxygen, install the silver bag on the vibrating table, fix the metal funnel on the silver bag and make the metal The lower end of the funnel is located in the silver sheath, and then the Bi-2223 precursor powder after the high-temperature ...

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Abstract

The invention discloses a method for manufacturing a B-2223 multi-core superconductive strip. The method includes the following steps: 1. conducting high temperature thermal processing on Bi-2223 precursor powder; 2. placing a shake table, a silver jacket and a metal tunnel inside a glove box, installing the silver jacket on the shake table, fixing the metal tunnel on the silver jacket, then dumping the Bi-2223 precursor powder to the metal tunnel for performing shaking and tabulation, and obtaining a tabulation complex body; 3. conducting drawing processing on the tabulation complex body to make a single core wire rod, conducting scaling, cross cutting and assembling on the single core wire rod to obtain a secondary complex body; 4. conducting drawing processing and intermediate annealing on the secondary complex body to obtain a multi-core wire rod, conducting rolling and heat processing to obtain a Bi-2223 multi-core superconductive strip. According to the invention, the method can effectively prevent the manufactured Bi-2223 multi-core superconductive strip from having bubbling, and at the same time improves evenness and intensity of the Bi-2223 multi-core superconductive strip and increases superconductive performances of the Bi-2223 superconductive strip.

Description

technical field [0001] The invention belongs to the technical field of high-temperature superconducting tape preparation, and in particular relates to a preparation method of Bi-2223 multi-core superconducting tape. Background technique [0002] Bi-2223 (Bi 2 Sr 2 Ca 2 Cu 3 o x ) High-temperature superconductor is the most important branch of high-temperature superconducting materials. Because of its easy processing and high current-carrying performance, it has become one of the most promising high-temperature superconducting materials. At present, the preparation technology combining the powder-in-tube method (PIT) and the melting method is the mainstream technology for preparing high-performance Bi-based high-temperature superconducting wire strips. This technology is to put the superconducting precursor powder into the silver tube, prepare a multi-core composite by drawing and assembling, and then process it to the designed wire strip size, and then perform heat trea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00H01B12/02
CPCH01B12/02H01B13/00Y02E40/60
Inventor 刘国庆郝清滨焦高峰徐晓燕郑会玲白利锋马小波李高山李成山张平祥
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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