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Method for continuously preparing two-sided texture high-temperature superconduction bibasic strip transition layer

A high-temperature superconducting and transition layer technology, applied in the usage of superconducting elements, superconducting devices, superconducting/high-conducting conductors, etc., can solve the problems of lack, the large-scale application of strip preparation technology is restricted, and achieve smooth surface. , to ensure double-sided consistency and single-sided uniformity, and the effect of high preparation efficiency

Inactive Publication Date: 2009-04-22
SOUTHWEST JIAOTONG UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, in the research and development of second-generation superconducting tapes, the lack of reliable, cost-effective, and easy-to-promote tape preparation technology is the bottleneck restricting large-scale applications

Method used

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  • Method for continuously preparing two-sided texture high-temperature superconduction bibasic strip transition layer
  • Method for continuously preparing two-sided texture high-temperature superconduction bibasic strip transition layer
  • Method for continuously preparing two-sided texture high-temperature superconduction bibasic strip transition layer

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specific Embodiment approach

[0032] A kind of specific embodiment of the present invention is:

[0033] A method for preparing a transition layer of a double-sided high-temperature superconducting tape by chemical solution deposition, which consists of the following steps in sequence:

[0034] a, preparation of precursor solution: dissolving cerous nitrate in N,N-dimethylformamide (DMF) to form a precursor solution (that is, the ion ratio of rare earth ion and cerium in this example is 0:1);

[0035] b. Colloid preparation: add polyacrylic acid (PAA) to the precursor solution of step a to form a colloid with good film-forming properties;

[0036] c. Film preparation and drying: the Ni alloy base tape is wound through the colloid obtained in step b (that is, a runner is set in the colloid, and the base tape walks around the runner from below, and the tape-out end and the tape-feed end are all in the colloid. above the colloid), at the end of the tape, the tape is pulled out vertically at a pulling speed o...

Embodiment 2

[0040] The preparation method of this example consists of the following steps in turn:

[0041] a. Preparation of precursor solution: Dissolve samarium nitrate and cerous nitrate in N,N-dimethylformamide (DMF) according to the ratio of cation ratio Sm:Ce=0.2:0.8 to form a precursor solution; that is, this example The doping element M used in is samarium Sm, and the final M x Ce 1-x o y x in the transition layer is equal to 0.2, and y is equal to 1.9, that is, the material of the transition layer made in this example is specifically Sm 0.2 Ce 0.8 o 1.9 ;

[0042] b. Colloid preparation: add polyacrylic acid (PAA) to the precursor solution of step a to form a colloid with good film-forming properties;

[0043] c. Film preparation and drying: wind the Ni alloy base tape into the colloid prepared in step b, and take out the tape vertically at the end of the strip at a pulling speed of 100mm / min, and make the Ni alloy base tape pass through the colloid for 10 seconds , after...

Embodiment 3

[0047] The preparation method of this example consists of the following steps in turn:

[0048] a. Preparation of precursor solution: Dissolve gadolinium nitrate and cerous nitrate in N,N-dimethylformamide (DMF) according to the ratio of cation ratio Gd:Ce=0.5:0.5 to form a precursor solution; that is, this example The doping element M used in is gadolinium Gd, and the final M x Ce 1-x o y x in the transition layer is equal to 0.5, and y is equal to 1.75, that is, the material of the transition layer prepared in this example is specifically Gd 0.5 Ce 0.5 o 1.75 ;

[0049] b. Colloid preparation: add polyacrylic acid (PAA) to the precursor solution of step a to form a colloid with good film-forming properties;

[0050] c. Film preparation and drying: wind the Ni alloy base tape into the colloid prepared in step b, and take out the tape vertically at the pulling speed of 50mm / min at the end of the tape, and make the Ni alloy base tape pass through the colloid for 20 second...

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Abstract

The invention discloses a method for continuously preparing a second generation high-temperature superconducting tape transition layer with double-side texture. The method comprises the following steps: cerous nitrate or rare-earth nitrate is dissolved in N,N-dimethylformamide (DMF) to obtain precursor solution; polyacrylic acid (PPA) or polymethacrylic acid is added to the precursor solution to prepare colloid; Ni alloy base band is wound to pass through the prepared colloid, and after the base band is taken out, the colloid is evenly dipped and coated on the surface of the base band and then dried; and finally, the base band is placed in a sintering furnace for molding. The method helps realize the continuous preparation and the high preparation efficiency of the high-temperature superconducting transition layer, and is suitable for mass industrialized production; meanwhile, the prepared double-side tape transition layer film has the advantages of good consistency, good evenness, high degree of orientation and high surface smoothness; and the critical thickness of the transition layer is thick.

Description

technical field [0001] The invention relates to the technical field of preparation of high-temperature superconducting second-generation tapes, in particular to the preparation technology of a transition layer of high-temperature superconducting second-generation tapes. Background technique [0002] Superconducting technology, as the ultimate energy-saving technology and highly environmentally friendly features, will become the core technology of this century. The high-performance superconducting tape will be the key to the large-scale application of superconducting technology. Bi 1986 2 Sr 2 Ca 2 Cu 3 o 10 The discovery of the first generation of high-temperature superconducting strips in the (Bi2223) system has aroused a wave of research worldwide, and realized commercial production, which has promoted the development of superconducting strong electric application technology. However, the physical intrinsic characteristics of Bi-based superconducting materials greatl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B12/06H01B13/00
CPCY02E40/642Y02E40/60
Inventor 雷鸣赵勇蒲明华张红李果程翠华
Owner SOUTHWEST JIAOTONG UNIV
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