Method for preparing yttrium barium copper oxide (YBCO) superconductive composite film

A technology of composite thin film and superconducting thin film is applied in the field of preparation of second-generation high-temperature superconducting tapes to achieve the effects of broadening the scope of application, improving current-carrying capacity, and reducing production costs

Inactive Publication Date: 2012-07-18
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

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

Method used

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  • Method for preparing yttrium barium copper oxide (YBCO) superconductive composite film
  • Method for preparing yttrium barium copper oxide (YBCO) superconductive composite film
  • Method for preparing yttrium barium copper oxide (YBCO) superconductive composite film

Examples

Experimental program
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Effect test

Embodiment 1

[0025] (1) Weigh yttrium acetate, barium acetate and copper acetate to be 0.005mol, 0.01mol and 0.015mol respectively, mix yttrium acetate, barium acetate and copper acetate and dissolve them in deionized water containing 10mol% trifluoroacetic acid to prepare Solution, wherein the molar ratio of solute and solvent in the solution is 1: 100;

[0026] (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;

[0027] (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, wherein the molar ratio of sol and methanol is 1:50;

[0028] (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...

Embodiment 2

[0034] (1) Weigh yttrium acetate, barium acetate and copper acetate to be 0.01mol, 0.02mol and 0.03mol respectively, mix yttrium acetate, barium acetate and copper acetate and dissolve in deionized water containing 20mol% trifluoroacetic acid to prepare Solution, wherein the molar ratio of solute and solvent in the solution is 1: 100;

[0035] (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;

[0036] (3) 3.175 mol of methanol was added to the gel obtained in step (2), stirred by a magnetic stirrer for 1 hour, and then the solvent was evaporated by a rotary evaporator to further remove impurities such as moisture to obtain a very pure gel, Wherein the molar ratio of sol and methanol is 1: 50;

[0037] (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 ma...

Embodiment 3

[0044] (1) Take by weighing yttrium acetate, barium acetate and copper acetate to be 0.015mol, 0.03mol and 0.045mol respectively, after mixing yttrium acetate, barium acetate and copper acetate, be dissolved in 1 deionized water containing 30mol% trifluoroacetic acid to prepare into a solution, wherein the molar ratio of solute and solvent in the solution is 1: 100;

[0045] (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;

[0046] (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, wherein the molar ratio of sol and methanol is 1:5;

[0047] (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 te...

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Abstract

Provided is a method for preparing an yttrium barium copper oxide (YBCO) superconductive composite film. Firstly, a precursor solution is prepared, namely yttrium acetate Y(CH3COO)3, barium acetate Ba(CH3COO)2 and cupric acetate Cu(CH3COO)2 are mixed and dissolved in a water solution containing 10-30 mol% of trifluoroacetic acid according to the molar ratio of Y to Ba to Cu being 1 to 2 to 3. The solvent is evaporated in a vacuum mode to obtain gel after even stirring. Carbinol is further added into the gel to be stirred evenly and then the solvent is dried to obtain gel. Afterwards, an appropriate amount of carbinol and terpineol are added into the solution to prepare a solution with 1.5-3.0 mol / L of total ion concentration of metal Y, metal Ba and metal Cu, after even stirring, zirconium acetylacetonate and titanium acetylacetonate which have 10%-15% of total ion molar concentration of metal Y, metal Ba and metal Cu are added into the solution to prepare the precursor solution. After that, the precursor solution is coated on a substrate. A coated film is first subjected to low temperature thermal decomposition at the temperature of 300-500 DEG C to decompose trifluoroacetic acid salt. Finally, the coated film is subjected to high temperature heat treatment at the temperature of 800-880 DEG C and annealing process at the temperature of 450-550 DEG C to form the YBCO superconductive composite film containing nanometer barium titanate and nanometer barium zirconate. The critical current density of the YBCO superconductive composite film reaches 7 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] Due to its unique physical properties (zero resistance, diamagnetism, tunnel effect, etc.), superconducting materials have attracted the attention of many scientists for nearly a century. Devices and equipment such as superconducting cables, superconducting transformers, superconducting motors, superconducting current limiters, and superconducting energy storage systems made of superconducting materials have the advantages of small size, light weight, high efficiency, and energy consumption that cannot be compared with conventional products. It has the advantages of low cost and large capacity, and has broad application prospects in the field of electric power. In order to realize the application of high-temperature superconducting materials in...

Claims

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Application Information

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IPC IPC(8): C04B35/45C04B35/622
Inventor 丁发柱古宏伟张腾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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