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Preparation method of YBa2Cu3O7-x(YBCO) high-temperature superconductive thick film

A high-temperature superconducting and thick-film technology, which is applied in the field of preparing a single-layer yttrium-barium-copper-oxygen high-temperature superconducting thick film, can solve problems such as the inability to evaluate superconducting properties, achieve an increase in critical current density, increase current-carrying capacity, and broaden applications range effect

Inactive Publication Date: 2013-07-03
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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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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  • Preparation method of YBa2Cu3O7-x(YBCO) high-temperature superconductive thick film
  • Preparation method of YBa2Cu3O7-x(YBCO) high-temperature superconductive thick film
  • Preparation method of YBa2Cu3O7-x(YBCO) high-temperature superconductive thick film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (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;

[0027] (2) After the solution prepared in step (1) was stirred by a magnetic stirrer for 1 hour, the solvent was evaporated by a rotary evaporator to obtain a gel;

[0028] (3) Add 50ml of methanol to the gel, stir it with a magnetic stirrer for 0.5 hours, and then use a rotary evaporator to evaporate the solvent to further remove impurities such as water to obtain a very pure gel;

[0029] (4) The gel prepared in step (4) is added to the mixed solution of 10ml methanol and 10ml terpineol, the volume ratio of the methanol and terpineol is 1: 1 to make Y, Ba and Cu A solution in which the total ion concentration of the three metals is 1.5 mol / L. The obtained methanol and terpineol solution con...

Embodiment 2

[0035] (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;

[0036] (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;

[0037] (3) Add 50 ml of methanol to the gel prepared in step (2), stir it 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;

[0038] (4) the gel that step (3) makes is added in the mixed liquor of 15ml methanol and 15ml terpineol, and the volume ratio of described methanol and terpineol is 1: 1, makes Y, Ba and Cu A solution in which the total ion concentration of the three metals is 2.0 mol / L. The obtained methanol and terpin...

Embodiment 3

[0044] (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;

[0045] (2) After the solution prepared in step (1) was stirred by a magnetic stirrer for 3 hours, the solvent was evaporated by a rotary evaporator to obtain a gel;

[0046] (3) Add 50 ml 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;

[0047] (4) the gel that step (3) makes is added in the mixed liquor of 15ml methanol and 15ml terpineol, and the volume ratio of described methanol and terpineol is 1: 1, makes Y, Ba and Cu A solution with a concentration of three metal ions of 3.0 mol / L. The obtained methanol and terpineol so...

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Abstract

The invention a preparation method of a YBa2Cu3O7-x(YBCO) high-temperature superconductive thick film. The preparation method comprises the following steps of: preparing precursor liquid; mixing yttrium acetate [Y(CH3COO)3], barium acetate [Ba(CH3COO)2] and copper acetate [Cu(CH3COO)2] according to the molar ratio of Y to Ba to Cu of 1:2:3; dissolving the mixture into aqueous solution of 10 to 30molar percent trifluoroacetic acid; stirring uniformly and drying the solvent by evaporation under vacuum to obtain gel; adding methanol and stirring uniformly; drying the solvent by evaporation to obtain gel; adding a proper amount of methanol and terpineol to prepare solution, wherein the total concentration of three kinds of metal ions of Y, Ba and Cu is 1.5 to 3.0 mol / L; stirring the solutionuniformly; adding titanium acetylacetonate in an amount which is 5 to 10 percent of the total molar concentration of the three kinds of metal ions to prepare precursor liquid; coating the precursor liquid on a substrate; perform low-temperature thermal treatment on the substrate coated with the precursor liquid at the temperature of between 300 and 500 DEG C to decompose trifluoroacetic acid salt; and performing high-temperature thermal treatment at the temperature of between 750 and 850 DEG C and annealing at the temperature of between 450 and 550 DEG C to form a nano titanium oxide-containing YBCO thick film. The critical current of the prepared YBCO thick film reaches 1,000 A / cm.

Description

technical field [0001] The invention relates to a method for preparing a superconducting layer in a second-generation high-temperature superconducting tape, in particular to a method for preparing a single-layer yttrium-barium-copper-oxygen high-temperature superconducting thick 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 fie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/624C04B35/01
Inventor 丁发柱古宏伟张腾
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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