SrZrO3 doped YBCO thin film and preparation method thereof

A thin film and coating technology, applied in the field of high-temperature superconducting material preparation, can solve the problems of complex equipment, high cost, high vacuum, etc., and achieve the effects of fast deposition speed, easy control, and simple equipment

Inactive Publication Date: 2010-06-30
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many research groups have successfully used the PLD method to prepare YBCO films doped with perovskite structure materials and rare earth oxide nanoparticles. High vacuum is required, not only the equipment is complicated, the cost is high, the most important thing is that it cannot flexibly change the dopant ratio, and it is not suitable for the development of practical high-temperature superconducting long strips
Compared with the PLD physical method, the MOD method has simple coating equipment, no vacuum, fast deposition speed, and is easy to make long strips. It has been widely used to prepare pure high-performance YBCO films, but the MOD method is used to prepare doped YBCO films. There are few studies

Method used

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  • SrZrO3 doped YBCO thin film and preparation method thereof
  • SrZrO3 doped YBCO thin film and preparation method thereof
  • SrZrO3 doped YBCO thin film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Dissolve 0.01mol yttrium acetate, 0.02mol barium acetate and 0.03mol copper acetate in deionized water, then add 11ml trifluoroacetic acid for complexation, then evaporate and concentrate at 50°C to obtain a blue transparent colloidal liquid, dilute with methanol , to obtain a 1.0mol / L YBCO precursor solution;

[0028] Dissolve strontium acetate and zirconium acetylacetonate in propionic acid at a molar ratio of 1:1 to obtain SrZrO with a total metal ion concentration of 1.0 mol / L 3 Precursor solution;

[0029] Press SrZrO 3 : The molar percentage of YBCO is 1% and SrZr0 3 The precursor solution is mixed with the YBCO precursor solution to obtain SrZrO 3 Doped YBCO precursor solution;

[0030] 2) SrZrO was coated by spin coating 3 The doped YBCO precursor solution is coated on the substrate to obtain a wet film, the coating film rotation speed is 3000 rpm, and the film coating time is 3 minutes;

[0031] 3) The wet film is pre-fired at a low temperature in wet ...

Embodiment 2

[0035] 1) Dissolve 0.005mol yttrium acetate, 0.01mol barium acetate and 0.015mol copper acetate in deionized water, then add 5.5ml trifluoroacetic acid for complexation, then evaporate and concentrate at 50°C to obtain a blue transparent colloidal liquid, and use methanol Dilute to obtain 1.5mol / L YBCO precursor solution;

[0036]Dissolve strontium acetate and zirconium acetylacetonate in propionic acid at a molar ratio of 1:1 to obtain SrZrO with a total metal ion concentration of 0.5 mol / L 3 Precursor solution;

[0037] Press SrZrO 3 : The molar percentage of YBCO is 6% SrZrO 3 The precursor solution is mixed with the YBCO precursor solution to obtain SrZrO 3 Doped YBCO precursor solution;

[0038] 2) SrZrO was coated by spin coating 3 The doped YBCO precursor solution is coated on the substrate to obtain a wet film, the coating film rotation speed is 4000 rpm, and the film coating time is 2 minutes;

[0039] 3) The wet film is pre-fired at a low temperature in wet oxy...

Embodiment 3

[0043] 1) Dissolve 0.01mol yttrium acetate, 0.02mol barium acetate and 0.03mol copper acetate in deionized water, add 11ml of trifluoroacetic acid for complexation, evaporate and concentrate at 50°C to obtain a blue transparent colloidal liquid, and use methanol Dilute to obtain 2mol / L YBCO precursor solution;

[0044] Dissolve strontium acetate and zirconium acetylacetonate in propionic acid at a molar ratio of 1:1 to obtain SrZrO with a total metal ion concentration of 0.1mol / L 3 Precursor solution;

[0045] Press SrZrO 3 : The molar percentage of YBCO is 10% SrZrO 3 The precursor solution is mixed with the YBCO precursor solution to obtain SrZrO 3 Doped YBCO precursor solution;

[0046] 2) SrZrO was coated by spin coating 3 The doped YBCO precursor solution is coated on the substrate to obtain a wet film, the coating film rotation speed is 6000 rpm, and the film coating time is 1 minute;

[0047] 3) The wet film is pre-fired at a low temperature in wet oxygen below 40...

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Abstract

A SrZrO3 doped YBCO film and a preparation method thereof belong to the technology field of the preparation of the superconducting material with high-temperature coat. The original PLD method has the defect that the equipment is complicated, the cost is high and the proportion of the dopant is not easy to control. The film provided by the invention consists of 1 to 15 molar percent of SrZrO and 85 to 99molar percent of YBCO. The invention prepares YBCO precursor solution by the deposition method of trifluoroacetic acid and metal-organic compound; the YBCO precursor solution and the propionatesolution comprising strontium acetate and zirconium acetylacetone are mixed to obtain the SrZrO3 doped YBCO precursor solution; then the SrZrO3 doped YBCO precursor solution is spin-coated or dip-coated on the base, and the base is sintered under the wet oxygen atmosphere and below 400 DEG C; finally the base is high-temperature sintered under the wet ArO2 mixing atmosphere and between 750 to 850DEG C to obtain the SrZrO3 doped YBCO film. The film of the invention has the advantages of higher critical current density, higher critical conversion temperature and biaxial texture in the magneticfiled, simple equipment and low cost.

Description

technical field [0001] The invention belongs to the technical field of high-temperature superconducting material preparation, and in particular relates to the preparation technology of high-temperature superconducting coating conductor superconducting film. Background technique [0002] With the deepening of laboratory research, the practical application of YBCO superconducting materials is approaching. However, to really achieve practical application, it is not only required to have a high current-carrying capacity (I c ), and maintain high superconducting properties as much as possible at high temperature and high field. At present, people have been able to prepare I c The YBCO thick film up to 1200A / cm-Width is enough to meet the requirements of the application under zero field. However, with the increase of the magnetic field, the flux creep is gradually intensified, and the J of the YBCO film c Decreases exponentially, so only by increasing the thickness of the film...

Claims

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Application Information

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IPC IPC(8): H01B12/00H01B13/00C04B35/01
CPCY02E40/64Y02E40/60
Inventor 刘敏索红莉叶帅汤潇吴紫平周美玲
Owner BEIJING UNIV OF TECH
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