Method for preparing thin film of high-temperature superconductive coating conductor BaZrO3 buffer layer

A technology of coated conductors and high-temperature superconductivity, which is applied in the manufacture/processing of superconductor devices, chemical instruments and methods, inorganic chemistry, etc., and can solve problems affecting the superconducting performance of ReBCO

Inactive Publication Date: 2013-08-14
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, during the phase formation heat treatment of ReBCO, there will be strong interdiffusion and chemical reactions between Ni-based alloys and ReBCO, which seriously affects the superconducting properties of ReBCO.

Method used

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  • Method for preparing thin film of high-temperature superconductive coating conductor BaZrO3 buffer layer
  • Method for preparing thin film of high-temperature superconductive coating conductor BaZrO3 buffer layer
  • Method for preparing thin film of high-temperature superconductive coating conductor BaZrO3 buffer layer

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Experimental program
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Effect test

Embodiment 1

[0028] The first specific embodiment of the present invention is a kind of high temperature superconducting coating conductor BaZrO 3 The method for buffer layer thin film, its step is:

[0029] a, preparation of anhydrous solution: barium acetate and zirconium acetylacetonate are equal to the ratio of 1: 1 by the ion number ratio of barium: zirconium, dissolve in propionic acid, ultrasonic makes solution uniform, forms anhydrous solution;

[0030] b. Colloid preparation: Add polyvinyl butyral (PVB) to the anhydrous solution in step a for ultrasonic dissolution to form a viscous colloid. The addition of polyvinyl butyral (PVB) accounts for 5% of the total mass of the colloid.

[0031] c. Colloid coating and drying: Coat the colloid prepared in step b on the substrate, and then dry at 150°C. The specific method of coating the colloid on the substrate of the coated conductor is as follows: drop the colloid on the substrate and rotate it with a glue leveler so that the colloid ...

Embodiment 2

[0037] The preparation method of this example consists of the following steps in turn:

[0038] a, preparation of anhydrous solution: barium acetate and zirconium acetylacetonate are equal to the ratio of 1: 1 by the ion number ratio of barium: zirconium, dissolve in propionic acid, ultrasonic makes solution uniform, forms anhydrous solution;

[0039]b. Colloid preparation: Add polyvinyl butyral (PVB) to the anhydrous solution in step a for ultrasonic dissolution to form a viscous colloid. The addition of polyvinyl butyral (PVB) accounts for 4% of the total mass of the colloid.

[0040] c. Colloid coating and drying: Coat the colloid prepared in step b on the substrate, and then dry at 100°C. The specific method of coating the colloid on the substrate of the coated conductor is as follows: drop the colloid on the substrate and rotate it with a glue leveler so that the colloid is evenly coated on the substrate.

[0041] d. Thermal decomposition treatment: place the colloid-co...

Embodiment 3

[0046] The preparation method of this example consists of the following steps in turn:

[0047] a, preparation of anhydrous solution: barium acetate and zirconium acetylacetonate are equal to the ratio of 1: 1 by the ion number ratio of barium: zirconium, dissolve in propionic acid, ultrasonic makes solution uniform, forms anhydrous solution;

[0048] b. Colloid preparation: Add polyvinyl butyral (PVB) to the anhydrous solution in step a for ultrasonic dissolution to form a viscous colloid. The amount of polyvinyl butyral (PVB) added accounts for 3% of the total mass of the colloid.

[0049] c. Colloid coating and drying: Coat the colloid prepared in step b on the substrate, and then dry at 200°C.

[0050] d. Thermal decomposition treatment: place the colloid-coated substrate in a sintering furnace, and feed argon gas into the sintering furnace to raise the furnace temperature to 170°C at a rate of 1°C / min, and then increase the temperature at a rate of 0.5°C / min. The speed ...

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Abstract

The invention discloses a method for preparing a thin film of a high-temperature superconductive coating conductor BaZrO3 buffer layer, belonging to the technical field of high-temperature superconductive material preparation. The thin film prepared by the method has good chemical compatibility, and can effectively block mutual diffusion of Ni and Cu in ReBCO. The method comprises the following steps: dissolving barium acetate and acetylacetone zirconium in propanoic acid to form a non-aqueous solution; adding polyvinyl butyral (PVB) to the non-aqueous solution so as to obtain a colloid with good film-forming performance; and coating the colloid on a substrate, drying and sintering into a phase in a sintering furnace so as to obtain the high-temperature superconductive coating conductor BaZrO3 buffer layer. The method is low in cost, simple in manufacturing process, easy to control operations and is environmentally-friendly.

Description

technical field [0001] The invention belongs to the technical field of preparation of high-temperature superconducting materials, in particular to BaZrO, a high-temperature superconducting coating conductor 3 Fabrication technology of buffer layer film. Background technique [0002] The second-generation high-temperature superconducting tape, that is, the rare earth barium copper oxide ReBCO coated conductor, has broad application prospects in power systems due to its excellent intrinsic electromagnetic properties, especially its excellent current-carrying capacity under high magnetic field. [0003] The composition of the high temperature superconducting layer of the coated conductor is ReBa 2 Cu 3 o x (referred to as ReBCO, Re is yttrium or lanthanide). For practical applications such as superconducting wires and superconducting magnets, brittle ReBCO high temperature oxide superconducting materials must be coated on metal substrates with excellent mechanical propertie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L39/24C01G25/00
Inventor 张欣张敏赵勇程翠华张勇王文涛雷鸣
Owner SOUTHWEST JIAOTONG UNIV
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