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Method for preparing YBCO superconducting composite film

A composite film, superconducting technology, applied in the usage of superconducting elements, the manufacture/processing of superconducting devices, superconducting devices, etc., can solve the problem of inability to evaluate superconducting properties, reduce production costs, and improve current-carrying capacity. , the effect of broadening the scope of application

Inactive Publication Date: 2013-11-06
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

More importantly, the two most important indicators for evaluating superconducting materials, critical current and critical current density, are not involved in this patent, and its superconducting performance cannot be evaluated.

Method used

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  • Method for preparing YBCO superconducting composite film
  • Method for preparing YBCO superconducting composite film
  • Method for preparing YBCO superconducting composite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Weigh yttrium acetate, barium acetate and copper acetate to be 0.005mol, 0.01mol and 0.015mol respectively, mix the yttrium acetate, barium acetate and copper acetate and dissolve them in 100ml deionized water containing 10mol% trifluoroacetic acid to prepare into solution;

[0029] (2) After the solution prepared in step (1) was stirred by a magnetic stirrer for 1 h, the solvent was evaporated by a rotary evaporator to obtain a gel;

[0030] (3) Add 30mL of methanol into the gel prepared in step (2), stir it with a magnetic stirrer for 0.5h, and then use a rotary evaporator to evaporate the solvent to further remove impurities such as water to obtain a very pure gel. glue;

[0031] (4) adding the gel prepared in step (3) into 20ml of methanol to make Y, Ba and Cu three kinds of metal total ion concentration is the precursor solution of 1.5mol / L;

[0032] (5) Spin-coat the precursor solution prepared in step (4) on the strontium titanate single crystal substrate a...

Embodiment 2

[0040] (1) Weigh yttrium acetate, barium acetate and copper acetate to be 0.01mol, 0.02mol and 0.03mol respectively, mix the yttrium acetate, barium acetate and copper acetate and dissolve in 200ml deionized water containing 20mol% trifluoroacetic acid to prepare into solution;

[0041] (2) After the solution prepared in step (1) was stirred by a magnetic stirrer for 2 hours, the solvent was evaporated by a rotary evaporator to obtain a gel;

[0042] (3) Add 60mL of methanol to the gel prepared in step (2), and then stir it with a magnetic stirrer for 1 hour, then use a rotary evaporator to evaporate the solvent to further remove impurities such as moisture to obtain a very pure gel ;

[0043] (4) adding the gel prepared in step (3) into 30ml of methanol to make Y, Ba and Cu three kinds of metal total ion concentration is the precursor solution of 2mol / L;

[0044] (5) The precursor solution prepared in step (4) was spin-coated on the lanthanum aluminate single crystal substr...

Embodiment 3

[0052] (1) Weigh yttrium acetate, barium acetate and copper acetate to be 0.015mol, 0.03mol and 0.045mol respectively, mix the yttrium acetate, barium acetate and copper acetate and dissolve them in 300ml deionized water containing 30mol% trifluoroacetic acid to prepare into solution;

[0053] (2) After the solution prepared in step (1) was stirred for 3 hours by a magnetic stirrer, the solvent was evaporated by a rotary evaporator to obtain a gel;

[0054] (3) Add 90mL of methanol into the gel prepared in step (2), stir with a magnetic stirrer for 1.5h, and then use a rotary evaporator to evaporate the solvent to further remove impurities such as moisture to obtain a very pure gel. glue;

[0055] (4) adding the gel prepared in step (3) into 30ml of methanol to make Y, Ba and Cu three kinds of metal total ion concentration is the precursor solution of 3.0mol / L;

[0056] (5) Spin-coat the precursor solution prepared in step (4) on the magnesium oxide single crystal substrate ...

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Abstract

Disclosed is a method for preparing a YBa2Cu3O7-x (YBCO) superconducting composite film, comprising mixing and dissolving ytterbium acetate <Y(CH3COO)3>, barium acetate <Ba(CH3COO)2>, and cupric acetate <Cu(CH3COO)2> into a water solution of trifluoroacetic acid according to a molar ratio of Y:Ba:Cu of 1.5:2:3; uniformly stirring, and evaporating the above solvent to dryness in vacuum to acquire a gel; adding methanol, uniformly stirring, and evaporating the resulting solvent to dryness to acquire a gel; adding methanol to prepare a precursor liquid in which the total concentration of the three types of metal ions of Y, Ba, and Cu is 1.5-3.0mol / L; coating the precursor liquid on a substrate; allowing the coated film to undergo a process of low-temperature heat treatment to decompose trifluoroacetate; allowing the coated film to undergo a process of high-temperature heat treatment to acquire a YBCO film having a tetragonal phase; coating a precursor liquid of cerium acetylacetonate on the YBCO film and carrying out a high-temperature heat treatment at a temperature ranged from 1000 DEG C to 1100 DEG C; and coating the precursor of Y, Ba, and Cu and the precursor of cerium acetylacetonate in turn repeatedly and carrying out corresponding heat treatment to acquire the YBCO superconducting film having a five-layer structure of YBCO / CeO2 / YBCO / CeO2 / YBCO with a thickness of 1.5 microns.

Description

technical field [0001] The invention relates to a preparation method of a high-temperature superconducting coating conductor, in particular to a preparation method of a YBCO superconducting composite film. Background technique [0002] Take YBa 2 Cu 3 o 7-x (YBCO) superconducting coating as the conductor of the second-generation high-temperature superconducting tape due to its excellent intrinsic properties (irreversible field reaches 7T at 77K, critical current density reaches 10 6 A / cm 2 ), attracting people to continuously explore and study its practical material-forming technology. The second-generation high-temperature superconducting tape is an important development direction of superconducting materials at present. It has broad application prospects and huge market potential, and can be widely used in energy, military industry, medical treatment, transportation and scientific research. Therefore, high-temperature superconducting materials and their preparation te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L39/24C04B35/45C04B35/622H01B12/00
CPCY02E40/64Y02E40/60
Inventor 丁发柱古宏伟张腾王洪艳屈飞戴少涛邱清泉蔡渊贺昱旻
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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