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SrTiO3 doped YBCO composite film and preparation method thereof

A composite thin film and precursor liquid technology, which is applied in the field of BCO high temperature superconducting thin film materials and its preparation, can solve the problems of exponential decrease and intensified magnetic flux creep, and achieve the effects of smooth surface, reduced damage, and good critical current density

Inactive Publication Date: 2016-12-14
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the increase of the magnetic field strength, the flux creep is gradually intensified, and the J of the YBCO film c Decreases exponentially, so only relying on increasing film thickness cannot meet the requirements of application under magnetic field

Method used

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  • SrTiO3 doped YBCO composite film and preparation method thereof
  • SrTiO3 doped YBCO composite film and preparation method thereof
  • SrTiO3 doped YBCO composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1)SrTiO 3 Precursor preparation of doped YBCO composite film:

[0025] 1) Dissolve yttrium acetate and barium acetate in deionized water at a molar ratio of 1:2, stir and dissolve at 60°C, and then add trifluoroacetate according to the molar ratio of yttrium acetate and trifluoroacetic acid as 1:3 Acetic acid, after fully reacting at 60°C, perform three times of rotary evaporation on a rotary evaporator, the evaporation temperature is controlled at 60°C to obtain a white powder, which is dissolved in anhydrous methanol to obtain a Y, Ba precursor;

[0026] 2) Dissolve copper acetate and methacrylic acid in anhydrous methanol at a molar ratio of 1:4. After fully refluxing the reaction at 90°C, perform three times of rotary evaporation on a rotary evaporator. The evaporation temperature is controlled at At 40°C, a blue gel was obtained, which was dissolved in anhydrous methanol to obtain a Cu precursor;

[0027] 3) Mix Y, Ba, and Cu precursor solutions and filter to ob...

Embodiment 2

[0035] (1)SrTiO 3 Precursor preparation of doped YBCO composite film:

[0036] 1) Dissolve yttrium acetate and barium acetate in deionized water at a molar ratio of 1:2. After fully stirring and dissolving at 55°C, add trifluoroacetate according to the molar ratio of yttrium acetate and trifluoroacetic acid as 1:3. Acetic acid, after fully reacting at 55°C, perform three times of rotary evaporation on a rotary evaporator, the evaporation temperature is controlled at 60°C, to obtain a white powder, which is dissolved in anhydrous methanol to obtain a Y, Ba precursor;

[0037] 2) Dissolve copper acetate and methacrylic acid in anhydrous methanol at a molar ratio of 1:4. After fully refluxing the reaction at 85°C, perform three rotary evaporations on a rotary evaporator, and control the evaporation temperature at 35°C. °C, a blue gel was obtained, which was dissolved in anhydrous methanol to obtain a Cu precursor;

[0038] 3) Mix the Y, Ba, and Cu precursor solutions and filter...

Embodiment 3

[0046] (1)SrTiO 3 Precursor preparation of doped YBCO composite film:

[0047] 1) Dissolve yttrium acetate and barium acetate in deionized water at a molar ratio of 1:2. After fully stirring and dissolving at 70°C, the molar ratio of yttrium acetate and trifluoroacetic acid is 1:(3-4 ) adding trifluoroacetic acid, after fully reacting at 70°C, performing 3 times of rotary evaporation on a rotary evaporator, the evaporation temperature is controlled at 70°C, to obtain a white powder, which is dissolved in anhydrous methanol to obtain a precursor solution of Y and Ba;

[0048] 2) Dissolve copper acetate and methacrylic acid in anhydrous methanol at a molar ratio of 1:4. After fully refluxing the reaction at 70°C, perform three rotary evaporations on a rotary evaporator, and the evaporation temperature is controlled at 50 °C, a blue gel was obtained, which was dissolved in anhydrous methanol to obtain a Cu precursor;

[0049] 3) Mix the precursor solutions of Y, Ba, and Cu and ...

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Abstract

The invention provides a SrTiO3 doped YBCO composite film and a preparation method thereof and belongs to the technical field of YBCO superconducting thin films. The film is prepared from, by molar percentage, 1-15% of SrTiO3 and 85-99% of YBCO. The SrTiO3 doped YBCO composite film is prepared in the steps that firstly, a YBCO precursor solution and a SrTiO3 precursor solution are prepared; secondly, a SrTiO3 doped YBCO precursor solution is prepared; thirdly, the precursor solution is coated; fourthly, gel wet film is sintered at low temperature; fifthly, a precursor amorphous film is sintered at high temperature. The prepared YBCO composite film has high biaxial stretching, good surface appearance and high critical current density.

Description

technical field [0001] The invention relates to a YBCO high-temperature superconducting thin film material and a preparation method thereof, belonging to the technical field of YBCO coated superconducting thin film preparation. Background technique [0002] Once the YBCO coated superconducting material was discovered, it aroused great interest. It has a high irreversible field (7T) and a high current-carrying capacity (up to 10 7 A / cm 2 ) and low AC loss. 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 strength, the flux creep is gradually intensified, and the J of the YBCO film c Decreases exponentially, so only relying on increasing the film thickness can not meet the requirements of the application in the magnetic field. How to improve the performance of thin films under magnetic field has become the key to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/50C04B35/624
CPCC04B35/50C04B35/62218C04B35/624C04B2235/48C04B2235/661C04B2235/96
Inventor 索红莉仪宁李春燕徐燕马麟王田田田民
Owner BEIJING UNIV OF TECH
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