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Method for preparing yttrium barium copper oxide high-temperature superconducting film

A high-temperature superconducting, yttrium-barium-copper-oxygen technology is applied in the field of preparation of high-temperature superconducting thin films, and can solve the problems of lack of evaluation of YBCO thin films and the like

Inactive Publication Date: 2015-03-25
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

Chinese patent CN 1931786A successfully prepared YBCO thin film through fluorine-free formic acid precursor solution, but the YBCO thin film prepared in this patent only has its critical transition temperature curve, and lacks a very important parameter for evaluating YBCO thin film—the measurement of critical current density

Method used

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  • Method for preparing yttrium barium copper oxide high-temperature superconducting film
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  • Method for preparing yttrium barium copper oxide high-temperature superconducting film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Take by weighing yttrium acetate, barium acetate and copper acetate to be 0.005mol, 0.01mol and 0.015mol respectively, after mixing yttrium acetate and copper acetate, be dissolved in 100ml deionized water containing 10mol% propionic acid to form solution 1 , dissolving barium acetate in 50ml deionized water containing trifluoroacetic acid and propionic acid is made into solution 2, and the molar ratio of trifluoroacetic acid and barium acetate in solution 2 is 1:3;

[0027] (2) Stir the solution 1 prepared in step (1) for 0.5h with a magnetic stirrer, and then use a rotary evaporator to remove the solvent to obtain gel 1; put the solution 2 prepared in step (1) on a magnetic stirrer at 60°C Stir for 0.5h, and then use a rotary evaporator to remove the solvent to obtain Gel 2;

[0028] (3) Mix the gel 1 and gel 2 prepared in the step (2) and add 30ml of methanol, stir with a magnetic stirrer for 0.5h, then add an appropriate amount of ammonia water to adjust to a so...

Embodiment 2

[0036] (1) Take by weighing yttrium acetate, barium acetate and copper acetate to be 0.01mol, 0.02mol and 0.03mol respectively, after mixing yttrium acetate and copper acetate, be dissolved in 100ml deionized water containing 15mol% propionic acid to form solution 1 , dissolving barium acetate in 50ml deionized water containing trifluoroacetic acid and propionic acid is made into solution 2, and the molar ratio of trifluoroacetic acid and barium acetate in solution 2 is 1:3;

[0037] (2) Stir the solution 1 prepared in step (1) with a magnetic stirrer for 1 h, and use a rotary evaporator to remove the solvent to obtain gel 1; stir the solution 2 prepared in step (1) with a magnetic stirrer at 60°C 1h, and then use a rotary evaporator to evaporate the solvent to obtain gel 2;

[0038] (3) Mix the gel 1 and gel 2 prepared in the step (2) and add 30ml of methanol, stir with a magnetic stirrer for 1 hour, then add an appropriate amount of ammonia water to adjust to a solution with...

Embodiment 3

[0046] (1) Take yttrium acetate, barium acetate and copper acetate to be 0.01mol, 0.02mol and 0.03mol respectively, mix the yttrium acetate and copper acetate and be dissolved in 100ml deionized water containing 20mol% propionic acid to form solution 1 , dissolving barium acetate in 50ml deionized water containing trifluoroacetic acid and propionic acid is made into solution 2, and the molar ratio of trifluoroacetic acid and barium acetate in solution 2 is 1:3;

[0047] (2) Stir the solution 1 prepared in step (1) for 1.5 h with a magnetic stirrer, and then use a rotary evaporator to remove the solvent to obtain gel 1; put the solution 2 prepared in step (1) on a magnetic stirrer at 60°C Stir for 1.5h, and then use a rotary evaporator to remove the solvent to obtain Gel 2;

[0048] (3) Mix the gel 1 and gel 2 prepared in the step (2) and add 30ml of methanol, stir with a magnetic stirrer for 1.5h, then add an appropriate amount of ammonia water to adjust to a solution with a p...

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Abstract

The invention relates to a method for preparing a yttrium barium copper oxide high-temperature superconducting film. The method comprises the following steps: firstly weighing yttrium acetate Y(CH3COO)3, barium acetate Ba(CH3COO)2 and cupric acetate Cu (CH3COO)2 according to the mole ratio of Y to Ba to Cu of 1:2:3; mixing the yttrium acetate and the cupric acetate, dissolving into a deionized water solution with 10-20mol% propanoic acid, uniformly stirring, and then carrying out vacuum evaporation on a solvent to obtain a gel 1; dissolving the barium acetate into a mixed solution of trifluoroacetic acid, the propanoic acid and deionized water, uniformly stirring, and then carrying out the vacuum evaporation on the solvent to obtain the gel 2, wherein the mole ratio of the trifluoroacetic acid to the barium acetate is 1:3; mixing the gel 1 and the gel 2, then adding methanol, uniformly stirring, then adding ammonia water, and regulating the pH of a solution to 5-7; carrying out the vacuum evaporation on the solvent of the solution to obtain a gel, and adding the methanol and terpilenol to prepare a precursor solution with total concentration of three metal ions, namely Y, Ba and Cu, at 1.0-2.0 mol / L; then coating the precursor solution on a substrate; firstly carrying out a fast low-temperature heat treatment process at 300-500 DEG C for 1 hour on a completely coated film, and then carrying out high-temperature heat treatment at 750-850 DEG C and an annealing process at 450-550 DEG C on the completely coated film to form the YBCO superconducting film.

Description

technical field [0001] The invention relates to a method for preparing a high-temperature superconducting thin film, in particular to a method for preparing a YBCO superconducting thin film. Background technique [0002] The application of YBCO thin film largely depends on the preparation technology of the thin film. Therefore, finding a suitable method for preparing high-quality YBCO thin films is a hot spot in the field of superconductivity. Among the various methods for preparing YBCO thin films including pulsed laser deposition, sputtering, multivariate co-evaporation and metal-organic chemical vapor deposition, trifluoroacetate-metal-organic deposition (TFA-MOD) has many advantages. advantage. Compared with magnetron sputtering, metal-organic chemical vapor deposition and pulsed laser deposition, which need to use expensive vacuum systems to prepare YBCO films, the preparation of YBCO films by TFA-MOD does not require vacuum equipment, so the cost of preparing YBCO fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/45C04B35/622H01B12/00
CPCY02E40/60
Inventor 丁发柱古宏伟王洪艳张慧亮张腾屈飞董泽斌
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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