Preparation method of YBCO (Yttrium Barium Copper Oxide) superconducting thin film

A technology of superconducting thin film and barium zirconate is applied in the field of preparation of second-generation high-temperature superconducting tapes to achieve the effects of reducing production cost, increasing critical current density and increasing critical current density

Inactive Publication Date: 2011-11-23
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

But the doped SrZrO prepared in this patent 3 The critical current density increases only at high fields

Method used

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  • Preparation method of YBCO (Yttrium Barium Copper Oxide) superconducting thin film
  • Preparation method of YBCO (Yttrium Barium Copper Oxide) superconducting thin film
  • Preparation method of YBCO (Yttrium Barium Copper Oxide) superconducting thin film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Weigh yttrium acetate, barium acetate and copper acetate to be 0.006mol, 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 h, the solvent was evaporated by a rotary evaporator to obtain a gel;

[0028] (3) 1.55mol of methanol is added to the gel obtained in step (2), and then stirred by a magnetic stirrer for 0.5h, and then the solvent is evaporated by a rotary evaporator to further remove impurities such as moisture to obtain a very pure gel gel;

[0029] (4) The gel prepared in step (4) is added to the mixed solution of 10.3ml methanol and 10.3ml terpineol, and the volume ratio of the methanol and terpineol is 1:1 to make Y, Ba and a solution with a total concentration of three metal ions of Cu and 1.5 mol / L. The obtaine...

Embodiment 2

[0035] (1) Weigh yttrium acetate, barium acetate and copper acetate to be 0.0135mol, 0.02mol and 0.03mol respectively, mix the yttrium acetate, barium acetate and copper acetate and dissolve them in 200ml deionized water containing 20mol% trifluoroacetic acid to prepare into solution;

[0036] (2) After the solution prepared in step (1) was stirred for 2 hours by a magnetic stirrer, the solvent was evaporated by a rotary evaporator to obtain a gel;

[0037] (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;

[0038] (4) The gel prepared in step (3) is added to the mixed solution of 15.8ml methanol and 15.8ml terpineol, the volume ratio of the methyl alcohol and terpineol is 1: 1 to make Y, Ba and a solution with a total concentration of three metal ions of Cu and 2.0mol / L. The obtained methanol and t...

Embodiment 3

[0045] (1) Weigh yttrium acetate, barium acetate and copper acetate to be 0.0225mol, 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;

[0046] (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;

[0047] (3) Add 4.875 mol of methanol to the gel prepared in step (2), stir 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;

[0048] (4) The gel prepared in step (3) is added to the mixed solution of 16.25ml methanol and 16.25ml terpineol, the volume ratio of the methanol and terpineol is 1:1, and Y, Ba and Cu three metal ion concentrations of 3.0mol / L solution. The obtained methanol and terpineol solution c...

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Abstract

The invention discloses a preparation method of a YBCO (Yttrium Barium Copper Oxide) superconducting thin film. The method comprises the following steps of: preparing a precursor solution, mixing yttrium acetate Y(CH3COO)3, barium acetate Ba(CH3COO)2 and copper acetate Cu(CH3COO)2 in the molar ratio (1.2-1.5):2:3 and dissolving the mixture into 10-30 mole percent aqueous solution of trifluoroacetic acid; uniformly stirring and evaporating a solvent in vacuum to obtain gel; adding methanol, uniformly stirring and evaporating a solvent to obtain gel; adding an appropriate amount of methanol andterpineol to obtain a solution in which the total concentration of metal ions such as Y, Ba and Cu is 1.5-3.0 mol/L, uniformly stirring and adding zirconium acetylacetonate in which the total ion molar concentration of three metals is 5-10 percent to obtain a precursor solution; coating the precursor solution on a substrate; thermally treating a coated thin film at the low temperature 300-500 DEGC and decomposing trifluoroacetates; and thermally treating at high temperature 750-850 DEG C and annealing at the temperature 450-550 DEG C to form the YBCO superconducting thin film containing nanometer yttrium oxide and nanometer barium zirconate. The critical current density of the YBCO thin film is 6 MA/cm<2> (77K, 0T).

Description

technical field [0001] The invention relates to a method for preparing a second-generation high-temperature superconducting tape, in particular to a method for preparing a YBCO superconducting 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 development in the field. [0003] At pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L39/24
Inventor 丁发柱古宏伟张腾屈飞戴少涛
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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