A kind of preparation method of ybco superconducting composite film

A composite thin film and superconducting thin film technology is applied in the field of preparation of YBCO superconducting composite thin film, which can solve the problems of small improvement, and achieve the effects of improving current carrying capacity, broadening application scope and reducing production cost.

Inactive Publication Date: 2017-02-08
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

The patent obtained doped SrZrO by adding strontium acetate and zirconium acetylacetonate to the precursor solution 3 YBCO films, but doped with SrZrO 3 The critical current density of the YBCO film is not much improved compared with the pure YBCO film

Method used

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  • A kind of preparation method of ybco superconducting composite film
  • A kind of preparation method of ybco superconducting composite film
  • A kind of preparation method of ybco superconducting composite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Weigh samarium acetate, yttrium acetate, barium acetate and copper acetate to be 0.00025mol, 0.005mol, 0.01mol and 0.015mol respectively, mix samarium acetate, yttrium acetate, barium acetate and copper acetate and dissolve them in 10mol% 54.45ml of deionized water of trifluoroacetic acid is made into solution;

[0028] (2) Stir the solution prepared in step (1) for 1 hour with a magnetic stirrer, and then use a rotary evaporator to remove the solvent to obtain a gel;

[0029] (3) Add 1.55 mol of methanol to the gel prepared in the step (2), stir it with a magnetic stirrer for 0.5 h, and then use a rotary evaporator to remove the solvent to further remove impurities such as water to obtain a very pure gel gel;

[0030] (4) Add the gel prepared in step (3) to a mixture of 10.05ml methanol and 10.05ml terpineol, the volume ratio of methanol and terpineol is 1:1, and make Sm, Y , Ba and Cu four metals with a total ion concentration of 1.5mol / L solution. Stir the obt...

Embodiment 2

[0036] (1) Weigh 0.0075mol, 0.01mol, 0.02mol and 0.03mol of samarium acetate, yttrium acetate, barium acetate and copper acetate respectively, mix samarium acetate, yttrium acetate, barium acetate and copper acetate and dissolve them in 20mol% 121.5ml of deionized water of trifluoroacetic acid is made into solution;

[0037] (2) Stir the solution prepared in step (1) for 2 hours with a magnetic stirrer, and then use a rotary evaporator to remove the solvent to obtain a gel;

[0038] (3) Add 3.175 mol of methanol to the gel prepared in step (2), stir with a magnetic stirrer for 1 hour, and then use a rotary evaporator to remove the solvent to further remove impurities such as water to obtain a very pure gel;

[0039] (4) Add the gel prepared in step (3) to a mixture of 16.88ml methanol and 16.88ml terpineol, the volume ratio of methanol and terpineol is 1:1, and make Sm, Y , Ba and Cu four metals with a total ion concentration of 2.0mol / L solution. Stir the obtained methanol an...

Embodiment 3

[0047] (1) Weigh 0.0015mol, 0.015mol, 0.03mol and 0.045mol of samarium acetate, yttrium acetate, barium acetate and copper acetate respectively, mix samarium acetate, yttrium acetate, barium acetate and copper acetate and dissolve them in 30mol% 164.7ml of deionized water of trifluoroacetic acid is made into solution;

[0048] (2) Stir the solution prepared in step (1) for 3 hours with a magnetic stirrer, and then use a rotary evaporator to remove the solvent to obtain a gel;

[0049] (3) Add 4.875 mol of methanol to the gel prepared in step (2), stir it with a magnetic stirrer for 1.5 hours, and then use a rotary evaporator to remove the solvent to further remove impurities such as water to obtain a very pure gel glue;

[0050] (4) Add the gel prepared in step (3) to a mixture of 15.25ml methanol and 15.25ml terpineol, the volume ratio of methanol and terpineol is 1:1, and make Sm, Y , Ba and Cu four kinds of metal ion concentration of 3.0mol / L solution. Stir the obtained ...

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Abstract

The invention relates to a preparation method of a YBa2Cu3O(7-x) superconductivity composite film. According to the preparation method, firstly, precursor liquid is prepared, i.e. Sm(CH3COO)3, Y(CH3COO)3, Ba(CH3COO)2 and Cu(CH3COO)2 are mixed and dissolved in 10-30 mol percent trifluoroacetic acid water solution according to the mol ratio that Sm:Y:Ba:Cu is (0.05-0.1):1:2:3; the mixed solution is uniformly stirred, then, solvents are dried through evaporation in a vacuum way, and gel is obtained; then, methyl alcohol is added and is uniformly stirred, then, the solvents are dried through evaporation, and gel is obtained; next, a proper amount of methyl alcohol and terpilenol are added, solution with the four-metal (Sm, Y, Ba and Cu) ion total concentration being 1.5 to 3.0mol / L is prepared, and the precursor liquid is prepared; then, the precursor liquid is coated on a substrate; the coated film is firstly subjected to 300 DEG C-500 DEG C low-temperature heat treatment process, and trifluoroacetic acid salts are decomposed; and finally, 800 DEG C-900 DEG C high-temperature heat treatment and 450 DEG C-550 DEG C annealing process are carried out, and the YBa2Cu3O(7-x) (YBCO ) superconductivity composite film containing nanometer samarium oxide is formed. The critical current density of the YBCO film prepared by the preparation method reaches 6MA / cm<2>(77k, 0T).

Description

technical field [0001] The invention relates to a method for preparing a superconducting layer of a second-generation high-temperature superconducting strip, in particular to a method for preparing a YBCO superconducting composite thin film. Background technique [0002] The second-generation high-temperature superconducting tape refers to a rare-earth barium copper oxide superconducting coating conductor mainly composed of YBCO-123 superconducting materials. It is composed of a metal alloy base band, a seed layer, a barrier layer, a cap layer, a rare earth barium copper oxide superconducting layer, a protective layer and a stable layer, and is a multilayer structure. Compared with the first-generation Bi-based high-temperature superconducting tape, the second-generation high-temperature superconducting tape has the ability to carry high current under high magnetic field, and can be applied under higher temperature and magnetic field. The focus of competing research and dev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L39/24
Inventor 丁发柱古宏伟张腾王洪艳屈飞彭星煜
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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