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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

A method for preparing a YBa2Cu3O7‑x superconducting composite film. First, prepare a precursor solution and combine samarium acetate Sm(CH3COO)3, yttrium acetate Y(CH3COO)3, barium acetate Ba(CH3COO)2 and copper acetate Cu(CH3COO)2 Mix and dissolve in an aqueous solution of 10-30 mol℅ trifluoroacetic acid according to the molar ratio of Sm:Y:Ba:Cu=0.05~0.1:1:2:3; stir evenly and then vacuum evaporate the solvent to dryness to obtain a gel; then add methanol and stir After uniformity, the solvent is evaporated to dryness to obtain a gel; then an appropriate amount of methanol and terpineol are added to prepare a solution with a total concentration of Sm, Y, Ba and Cu metal ions of 1.5-3.0 mol / L to prepare a precursor solution; then The precursor liquid is coated on the substrate; the coated film first undergoes a low-temperature heat treatment process of 300℃-500℃ to decompose trifluoroacetate; finally it undergoes a high-temperature heat treatment of 800℃-900℃ and an annealing process of 450℃-550℃ Formation of YBa2Cu3O7‑x (YBCO) superconducting composite film containing nanometer samarium oxide. The critical current density of the YBCO film prepared by the present invention reaches 6MA / cm2 (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): H01L39/24H10N60/01
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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