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Preparation method of yttrium barium copper oxide (YBCO) coating conductor

A technology for coating conductors and barium cerate, which is applied in the field of preparation of second-generation high-temperature superconducting tapes to achieve the effects of reducing production costs, increasing critical current density, and increasing critical current density

Inactive Publication Date: 2012-10-24
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 yttrium barium copper oxide (YBCO) coating conductor
  • Preparation method of yttrium barium copper oxide (YBCO) coating conductor
  • Preparation method of yttrium barium copper oxide (YBCO) coating conductor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Weigh 0.006mol, 0.01mol and 0.015mol of yttrium acetate, barium acetate and copper acetate respectively, mix the yttrium acetate, barium acetate and copper acetate and dissolve them in 100ml deionized water containing 10mol% trifluoroacetic acid. into solution;

[0027] (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;

[0028] (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;

[0029] (4) Add the gel prepared in step (4) to a mixture of 10.3ml methanol and 10.3ml terpineol, the volume ratio of 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 obtained methanol and terpineol solution containing Y, Ba...

Embodiment 2

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

[0036] (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;

[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) Add the gel prepared in step (3) to a mixture of 15.8ml methanol and 15.8ml terpineol, the volume ratio of methanol 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 terpineol solution containing Y,...

Embodiment 3

[0045] (1) Weigh 0.0225mol, 0.03mol and 0.045mol of yttrium acetate, barium acetate and copper acetate respectively, mix the yttrium acetate, barium acetate and copper acetate and dissolve them in 300ml of deionized water containing 30mol% trifluoroacetic acid. into solution;

[0046] (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;

[0047] (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;

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

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Abstract

The invention discloses a preparation method of an yttrium barium copper oxide (YBCO) coating conductor. The method comprises the following steps of: firstly mixing and dissolving yttrium acetate (CH3COO)3, barium acetate Ba (CH3COO)2 and cupric acetate Cu(CH3COO)2 according to the molar rate of Y to Ba to Cu=1.2-1.5 to 2 to 3 into water solution with 10-30 mol percent of trifluoroacetic acid; uniformly stirring the mixture, and drying solvent in vacuum to prepare gel; adding methanol into the mixture for uniformly stirring, and drying the solvent to prepare the gel; subsequently, adding proper amount of methanol and terpinol to prepare a solution of which the total concentration of three metal ions of Y, Ba and Cu is 1.5-3.0mol / L; uniformly stirring the mixture and adding 5-10 percent of acetylacetone having the total ion mol concentration of three metals to prepare a precursor; coating the precursor on a substrate; performing thermal-treatment on the coated film at the low temperature of 300-500 DEG C and decomposing trifluoroacetic acid salt; and finally performing high-temperature thermal treatment at the temperature of 750-850 DEG C and an annealing process at the temperature of 450-550 DEG C to form YBCO superconduction composite film containing nanometer yttrium oxide and nanometer cerium acid barium. The critical current density of the YBCO film prepared by the method reaches 5MA / cm2 (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 coated conductor. 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. At present, at least 5 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00
Inventor 丁发柱古宏伟张腾王洪艳屈飞戴少涛邱清泉
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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