Preparation method of SrTiO3 and LaAlO3 dual-nanometer particle doping YBCO composite thin film

A nanoparticle and composite film technology, applied in cable/conductor manufacturing, usage of superconducting elements, superconducting/high-conducting conductors, etc. The effect of enhancing the bonding ability, improving the electrical conductivity, and improving the current carrying capacity

Active Publication Date: 2017-03-08
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the pinning of the film is limited under the current external magnetic field and the current carrying capacity cannot be continuously improved, and to provide a new type of strontium titanate (SrTiO 3 , STO) and lanthanum aluminate (LaAlO 3 , LAO) preparation method of double nanoparticles doped YBCO composite film

Method used

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  • Preparation method of SrTiO3 and LaAlO3 dual-nanometer particle doping YBCO composite thin film
  • Preparation method of SrTiO3 and LaAlO3 dual-nanometer particle doping YBCO composite thin film
  • Preparation method of SrTiO3 and LaAlO3 dual-nanometer particle doping YBCO composite thin film

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Embodiment 1

[0025](1) Preparation of SrTiO 3 and LaAlO 3 Double nanoparticles doped YBCO composite precursor:

[0026] 1) Preparation of YBCO precursor solution: Dissolve 0.845g of yttrium acetate tetrahydrate and 1.275g of barium acetate tetrahydrate in deionized water, add 3.5ml of trifluoroacetic acid, stir in a water bath at 60°C for 3 hours, and place the resulting solution in a rotary evaporator Upward distillation, the distillation temperature is 60°C, the white powder obtained is added to anhydrous methanol to redissolve, and the precursor solution A of Y and Ba salt is obtained; 1.497g copper acetate tetrahydrate and 2.582g α-methacrylic acid are added to anhydrous methanol In , fully reflux reaction at 90°C for 3h, then carry out three distillations on a rotary evaporator, the distillation temperature is 40°C, evaporate to dryness and dissolve with anhydrous methanol to obtain Cu salt precursor solution B; mix precursor solutions A and B , distilled under low pressure at 40°C,...

Embodiment 2

[0034] (1) Preparation of SrTiO 3 and LaAlO 3 Double nanoparticles doped YBCO composite precursor:

[0035] 1) Preparation of YBCO precursor solution: Dissolve 0.845g of yttrium acetate tetrahydrate and 1.275g of barium acetate tetrahydrate in deionized water, add 3.5ml of trifluoroacetic acid, stir in a water bath at 60°C for 3 hours, and place the resulting solution in a rotary evaporator Upward distillation, the distillation temperature is 60°C, the white powder obtained is added to anhydrous methanol to redissolve, and the precursor solution A of Y and Ba salt is obtained; 1.497g copper acetate tetrahydrate and 2.582g α-methacrylic acid are added to anhydrous methanol In , fully reflux reaction at 90°C for 3h, then carry out three distillations on a rotary evaporator, the distillation temperature is 40°C, evaporate to dryness and dissolve with anhydrous methanol to obtain Cu salt precursor solution B; mix precursor solutions A and B , distilled under low pressure at 40°C...

Embodiment 3

[0043] (1) Preparation of SrTiO 3 and LaAlO 3 Double nanoparticles doped YBCO composite precursor:

[0044] 1) Preparation of YBCO precursor solution: Dissolve 0.845g of yttrium acetate tetrahydrate and 1.275g of barium acetate tetrahydrate in deionized water, add 3.5ml of trifluoroacetic acid, stir in a water bath at 60°C for 3 hours, and place the resulting solution in a rotary evaporator Upward distillation, the distillation temperature is 60°C, the white powder obtained is added to anhydrous methanol to redissolve, and the precursor solution A of Y and Ba salt is obtained; 1.497g copper acetate tetrahydrate and 2.582g α-methacrylic acid are added to anhydrous methanol In , fully reflux reaction at 90°C for 3h, then carry out three distillations on a rotary evaporator, the distillation temperature is 40°C, evaporate to dryness and dissolve with anhydrous methanol to obtain Cu salt precursor solution B; mix precursor solutions A and B , distilled under low pressure at 40°C...

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Abstract

The invention relates to a preparation method of a SrTiO3 and LaAlO3 dual-nanometer particle doping YBCO composite thin film. The preparation method comprises the following steps of spin-coating a precursor solution on a substrate to obtain a precursor film attached onto a surface of the substrate; placing the precursor film in a quartz tube furnace introduced with dry oxygen, and rising a temperature to 150 DEG C with a rate of 10 DEG C per minute in a room temperature; rising the temperature to 400 DEG C with a rate of 1.5-3 DEG C per minute, performing heat preservation for 10 minutes, and changing the dry oxygen to humid oxygen when the temperature is higher than 150 DEG C, wherein the moisture content is 3.1%; rising the temperature to 770-840 DEG C with a rate of 5 DEG C per minute, and performing heat preservation for 2-3 hours, changing the atmosphere to a dry Ar / O2 atmosphere during the temperature rising process from 400 DEG C to 500 DEG C, and changing to humid Ar / O2 when the temperature is risen to 550 DEG C; changing the humid Ar / O2 to the dry Ar / O2 atmosphere in the last 30 minutes of heat preservation; and cooling a sample with the furnace after heat preservation is completed. By the method, the problems that the thin film is limited in pinning and the carrying capacity cannot be continuously improved under an externally-applied magnetic field are solved.

Description

technical field [0001] The invention belongs to the technical field of preparation of high-temperature superconducting materials, and in particular relates to a method for preparing a double nanoparticle-doped YBCO composite thin film. Background technique [0002] Among many superconducting materials, yttrium barium copper oxide (YBa 2 Cu 3 o 7 , YBCO) as the representative of the second-generation high-temperature superconducting coating conductor has a high irreversible field (7T) in the liquid nitrogen temperature region (77K), and a high current-carrying capacity (up to 10 7 A / cm 2 ), low AC loss and potential price advantage, it is considered to be the most potential superconducting material. Superconducting materials are mostly used under certain external magnetic field conditions, but studies have shown that the J c The value has the following relationship with the applied magnetic field: J c =H -α , with the increase of the applied magnetic field strength, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B12/02H01B13/00
CPCH01B12/02H01B13/00Y02E40/60
Inventor 索红莉王田田徐燕仪宁李春燕马麟刘敏王毅孙硕田民
Owner BEIJING UNIV OF TECH
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