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 problems such as critical transition temperature drop, and achieve the effects of smooth surface, reduced impact, and simple equipment

Inactive Publication Date: 2010-04-14
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

Method used

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  • 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 with a stoichiometric ratio of 10% for complexation, and evaporate and concentrate at 50°C to obtain blue Color transparent colloidal liquid, dilute with methanol, obtain the YBCO precursor solution of 1.5mol / L;

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

[0025] C, the Ti precursor solution and the YBCO precursor solution are mixed according to the molar weight of Ti being 4% of the YBCO molar weight to obtain a Ti-doped YBCO precursor solution;

[0026] 2) Coating the Ti-doped YBCO precursor solution onto the substrate by spin coating to obtain a gel wet film, the coating rotation speed is 3000 rpm, and the coating time is 2 minutes...

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, then add trifluoroacetic acid with a stoichiometric ratio of 10% for complexation, and evaporate and concentrate at 50°C to obtain blue Color transparent colloidal liquid, dilute with methanol, obtain the YBCO precursor solution of 1.9mol / L;

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

[0034] C, the Ti precursor solution and the YBCO precursor solution are mixed according to the molar weight of Ti being 6% of the YBCO molar weight to obtain a Ti-doped YBCO precursor solution;

[0035] 2) Coating the Ti-doped YBCO precursor solution onto the substrate by spin coating to obtain a gel wet film, the coating rotation speed is 3500 rpm, and the coating time is 1 minute;...

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, then add trifluoroacetic acid with a stoichiometric ratio of 10% for complexation, and evaporate and concentrate at 60°C to obtain blue Color transparent colloidal liquid, dilute with methanol, obtain the YBCO precursor solution of 2mol / L;

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

[0043] C, mixing the Ti precursor solution and the YBCO precursor solution according to the molar weight of Ti being 8% of the YBCO molar weight, to obtain a Ti-doped YBCO precursor solution;

[0044] 2) Coating the Ti-doped YBCO precursor solution onto the substrate by spin coating to obtain a gel wet film, the coating rotation speed is 4000 rpm, and the coating time is 1 minute;

...

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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 in particular relates to a preparation method of a Ti-doped YBCO thin film. Background technique [0002] As a typical representative of the second-generation superconducting material, YBCO has been a hot spot in superconducting research all over 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 an external magnetic field, and its critical current (I c ) and critical current density (J c ) all decrease rapidly with the increase of the external 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 its own field, but also to require it to be able to wi...

Claims

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Application Information

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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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