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Method for preparing high-temperature superconductive coated conductor SrZrO3 buffer film

A coating conductor and high-temperature superconducting technology, which is applied in the field of preparation of high-temperature superconducting buffer layer films, can solve problems such as affecting the superconducting properties of ReBCO, and achieve the effects of reducing production cost, easy operation control, and simple production process.

Inactive Publication Date: 2011-09-07
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 high-temperature superconductive coated conductor SrZrO3 buffer film
  • Method for preparing high-temperature superconductive coated conductor SrZrO3 buffer film
  • Method for preparing high-temperature superconductive coated conductor SrZrO3 buffer film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation method of this example consists of the following steps in turn:

[0028] a, anhydrous solution preparation: strontium acetate and zirconium acetylacetonate are equal to the ratio of 1: 1 by the ion number ratio of strontium: zirconium, dissolve in propionic acid, form anhydrous solution;

[0029] b. Colloid preparation: Add polyvinyl butyral (PVB) to the anhydrous solution in step a to form a colloid; the amount of polyvinyl butyral (PVB) accounted for 5% of the total mass of the colloid.

[0030] c. Colloid coating and drying: coat the colloid prepared in step b on the substrate, and then dry; covered on the substrate. The temperature during drying was 150°C.

[0031] d. Thermal decomposition treatment: place the colloid-coated substrate in a sintering furnace, and feed argon into the sintering furnace to raise the furnace temperature from room temperature to 170°C at a rate of 1°C / min, and then at a rate of 0.9°C / min. The speed of min is raised to 5...

Embodiment 2

[0036] The preparation method of this example consists of the following steps in turn:

[0037] a, anhydrous solution preparation: strontium acetate and zirconium acetylacetonate are equal to the ratio of 1: 1 by the ion number ratio of strontium: zirconium, dissolve in propionic acid, form anhydrous solution;

[0038] b. Colloid preparation: Add polyvinyl butyral (PVB) to the anhydrous solution in step a to form a colloid; the amount of polyvinyl butyral (PVB) added accounts for 4% of the total mass of the colloid.

[0039] c. Colloid coating and drying: coat the colloid prepared in step b on the substrate, and then dry; covered on the substrate. The temperature during drying was 100°C.

[0040] d. Thermal decomposition treatment: place the colloid-coated substrate in a sintering furnace, and feed argon into the sintering furnace to raise the furnace temperature from room temperature to 240°C at a rate of 1°C / min, and then increase the temperature at a rate of 0.1°C / min. The...

Embodiment 3

[0045] The preparation method of this example consists of the following steps in turn:

[0046] a, anhydrous solution preparation: strontium acetate and zirconium acetylacetonate are equal to the ratio of 1: 1 by the ion number ratio of strontium: zirconium, dissolve in propionic acid, form anhydrous solution;

[0047] b. Colloid preparation: Add polyvinyl butyral (PVB) to the anhydrous solution in step a to form a colloid; the amount of polyvinyl butyral (PVB) added accounts for 3% of the total mass of the colloid.

[0048] c. Colloid coating and drying: coat the colloid prepared in step b on the substrate, and then dry; covered on the substrate. The temperature during drying was 200°C.

[0049] 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 from room temperature to 190°C at 1°C / min, and then at 0.4°C / min The speed of min is raised to 530°C, and th...

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Abstract

The invention discloses a method for preparing a high-temperature superconductive coated conductor SrZrO3 buffer film, relating to the technical field of high-temperature superconductive material preparation. The film prepared by the method has excellent chemical compatibility and can effectively prevent Ni and Cu in ReBCO from mutual diffusion. The method comprises the following steps: dissolving strontium acetate and acetyl acetone zirconium in propionic acid to form an anhydrous solution; adding PVB in the anhydrous solution to prepare gel with good film forming performance; coating the gel on a substrate, drying, and sintering into a phase in a sintering furnace to finally obtain the high-temperature superconductive coated conductor SrZrO3 buffer film.

Description

technical field [0001] The invention relates to the technical field of preparation of high-temperature superconducting materials, in particular to the preparation technology of high-temperature superconducting buffer layer films. 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 properties (strength, toughness) t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B12/06
CPCY02E40/642Y02E40/60
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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