Ti-doped YBCO film preparation process

A thin film and precursor solution technology, which is applied in the field of YBCO thin film preparation, can solve the problem of critical transition temperature drop and achieve the effect of smooth surface, good critical current density and easy control

Inactive Publication Date: 2011-04-20
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing doped YBCO thin film reduces the critical transition temperature while improving the superconducting performance, the present invention adopts the MOD method with simple equipment, low cost, fast deposition speed, and easy to make long strips to carry out the YBCO thin film Ti doping

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  • Ti-doped YBCO film preparation process
  • Ti-doped YBCO film preparation process
  • Ti-doped YBCO film preparation process

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Experimental program
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Effect test

Embodiment 1

[0022] 1) Preparation of Ti-doped YBCO precursor solution:

[0023] A. Dissolve yttrium acetate, barium acetate and copper acetate in deionized water at a molar ratio of 1:2:3, then add trifluoroacetic acid 10% higher than the stoichiometric ratio for complexation, and evaporate and concentrate at 50°C to obtain blue Color transparent colloidal liquid, dilute with methanol to obtain 1.5mol / L YBCO precursor solution;

[0024] B. Dissolve tetrabutyl titanate and acetylacetone in methanol at a molar ratio of 1:1 to obtain a Ti precursor solution with a total metal ion concentration of 0.3 mol / L;

[0025] C. Mix the Ti precursor solution and the YBCO precursor solution so that the molar amount of Ti is 4% of the molar amount of YBCO to obtain a Ti-doped YBCO precursor solution;

[0026] 2) The Ti-doped YBCO precursor solution is applied to the substrate by spin coating to obtain a gel wet film, the coating revolution is 3000 revolutions / min, and the coating time is 2 minutes;

[0027] 3) L...

Embodiment 2

[0031] 1) Preparation of Ti-doped YBCO precursor solution:

[0032] A. Dissolve yttrium acetate, barium acetate and copper acetate in deionized water at a molar ratio of 1:2:3, add trifluoroacetic acid 10% higher than the stoichiometric ratio to complex, and evaporate and concentrate at 50°C to obtain blue Color transparent colloidal liquid, dilute with methanol to obtain 1.9mol / L YBCO precursor solution;

[0033] B. Dissolve tetrabutyl titanate and acetylacetone in methanol at a molar ratio of 1:1 to obtain a Ti precursor solution with a total metal ion concentration of 0.8 mol / L;

[0034] C. Mix the Ti precursor solution and the YBCO precursor solution so that the molar amount of Ti is 6% of the molar amount of YBCO to obtain a Ti-doped YBCO precursor solution;

[0035] 2) Apply the Ti-doped YBCO precursor solution to the substrate by spin coating to obtain a gel wet film, with a coating revolution of 3500 revolutions per minute, and a coating time of 1 minute;

[0036] 3) Low-temper...

Embodiment 3

[0040] 1) Preparation of Ti-doped YBCO precursor solution:

[0041] A. Dissolve yttrium acetate, barium acetate and copper acetate in deionized water at a molar ratio of 1:2:3, add trifluoroacetic acid 10% higher than the stoichiometric ratio to complex, and evaporate and concentrate at 60°C to obtain blue Color transparent colloidal liquid, dilute with methanol to obtain 2mol / L YBCO precursor solution;

[0042] B. Dissolve tetrabutyl titanate and acetylacetone in methanol at a molar ratio of 1:1 to obtain a Ti precursor solution with a total metal ion concentration of 0.5 mol / L;

[0043] C. Mix the Ti precursor solution and YBCO precursor solution so that the molar amount of Ti is 8% of the molar amount of YBCO to obtain a Ti-doped YBCO precursor solution;

[0044] 2) The Ti-doped YBCO precursor solution is applied to the substrate by spin coating to obtain a gel wet film, the coating revolution is 4000 revolutions per minute, and the coating time is 1 minute;

[0045] 3) Low-temperat...

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Abstract

The invention belongs to the technical field of high-temperature coating superconducting material preparation, and prepares a Ti-doped YBCO film through the following steps that preparing YBCO precursor solution and Ti precursor solution, preparing Ti-doped YBCO precursor solution, coating a gel wet film, sintering the gel wet film with low temperature, and sintering a precursor amorphous film with high temperature. The preparation process of the invention adopts simple devices, and has low cost, and the prepared film has higher critical current density, critical conversion temperature and a double-shaft textured structure.

Description

Technical field [0001] The invention belongs to the technical field of preparation of high-temperature coating superconducting materials, and specifically relates to a method for preparing a Ti-doped YBCO film. Background technique [0002] As a typical representative of the second generation of superconducting materials, YBCO has been a hot spot in superconducting research around the world since it was discovered in 1987 due to its own intrinsic characteristics, potential application prospects and price advantages. However, the application of superconducting materials is mostly in the environment of external magnetic field, and its critical current (I c ) And critical current density (J c ) Are all decreased rapidly with the increase of the applied magnetic field. Therefore, in order to realize its practical application, it is necessary not only to improve the current-carrying capacity of the coated conductor under the self-field, but also to require it to also work under a highe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00H01B12/06C04B35/01C04B35/622
CPCY02E40/642Y02E40/60
Inventor 吴紫平索红莉刘敏叶帅汤潇
Owner BEIJING UNIV OF TECH
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