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A kind of preparation method of high temperature superconducting rebco film

A high-temperature superconducting and thin-film technology, which is applied in the field of preparation of high-temperature superconducting REBCO thin films, can solve the problems of REBCO superconducting thin-film performance degradation, non-oriented nucleation, and more liquid phase formation, so as to reduce arbitrary body nucleation and improve Effect of superconductivity and uniformity improvement

Active Publication Date: 2019-01-04
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These two methods have certain defects. The first method contains barium carbonate which is difficult to decompose during the preparation process. Generally, a higher crystallization temperature is required to completely remove it. Residual carbonate will lead to a decrease in the performance of the REBCO superconducting film.
In the second method, the fluorine content will lead to excessive liquid phase formation in the phase formation process, non-oriented nucleation, slow growth, and performance degradation

Method used

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  • A kind of preparation method of high temperature superconducting rebco film
  • A kind of preparation method of high temperature superconducting rebco film
  • A kind of preparation method of high temperature superconducting rebco film

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Embodiment 1

[0027] The method for preparing the high-temperature superconducting YBCO film in this embodiment comprises the following steps:

[0028] Step 1. Preparation of fluorine-free precursor solution: Dissolve yttrium propionate, barium propionate, and copper propionate in a mixed solvent of propionic acid and ethanol according to the atomic ratio of Y:Ba:Cu=1:1.75:3. Under the condition of stirring for 2h to completely dissolve, the total cation molar concentration is 1.5mol / L fluorine-free precursor solution; the volume ratio of propionic acid and ethanol in the mixed solvent is 1:5.5;

[0029] Step 2, preparation of fluorine-containing precursor solution: dissolve the organic salt of yttrium propionate, barium, copper propionate in the mixed solvent of propionic acid and ethanol by Y:Ba:Cu=1:1.75:3 atomic ratio, at 70 Stirring under the condition of ℃ for 2h until completely dissolved, the fluorine-containing precursor solution with a total molar concentration of cations of 1.8mo...

Embodiment 2

[0036] The method for preparing the high-temperature superconducting GdBCO film in this embodiment comprises the following steps:

[0037] Step 1. Preparation of fluorine-free precursor solution: Dissolve gadolinium propionate, barium propionate, and copper propionate in a mixed solvent of propionic acid and ethanol according to the atomic ratio of Gd:Ba:Cu=1:1.75:3. Under the condition of stirring for 3h to completely dissolve, the total cation molar concentration is 1.5mol / L fluorine-free precursor solution; the volume ratio of propionic acid and ethanol in the mixed solvent is 1:5;

[0038] Step 2, preparation of fluorine-containing precursor solution: dissolving gadolinium propionate, organic salt of barium, and copper propionate in a mixed solvent of propionic acid and ethanol at an atomic ratio of Gd:Ba:Cu=1:1.8:3, Stirring under the condition of ℃ for 3h until completely dissolved, the fluorine-containing precursor solution with a total molar concentration of cations of...

Embodiment 3

[0045] The method for preparing the high-temperature superconducting YBCO film in this embodiment comprises the following steps:

[0046] Step 1. Preparation of fluorine-free precursor solution: Dissolve yttrium propionate, barium propionate, and copper propionate in a mixed solvent of propionic acid and ethanol according to the atomic ratio of Y:Ba:Cu=1:1.75:3. Under the condition of stirring for 1.5h to completely dissolve, the total cation molar concentration is 1.5mol / L fluorine-free precursor solution; the volume ratio of propionic acid and ethanol in the mixed solvent is 1:8;

[0047] Step 2, preparation of fluorine-containing precursor solution: dissolving the organic salt of yttrium propionate, barium, copper propionate in the mixed solvent of propionic acid and ethanol by the atomic ratio of Y: Ba: Cu=1: 1.75: 3, at 80 Stirring under the condition of ℃ for 2h until completely dissolved, the fluorine-containing precursor solution with a total molar concentration of cat...

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Abstract

The invention provides a production method of a high-temperature superconductive REBCO film. The method comprises the following steps: 1, preparing a fluorine-free precursor solution according to an atom ratio of RE:Ba:Cu of 1:1.75:3; 2, preparing a fluorine-containing precursor solution according to an atom ratio of RE:Ba:Cu of 1:(1.5-2):3; 3, uniformly coating a LaAlO3 substrate with the fluorine-free precursor solution through adopting a spin coating technology, and carrying out heat treatment to obtain a fluorine-free monolayer precursor film; 4, uniformly coating the fluorine-free monolayer precursor film with the fluorine-containing precursor solution through adopting the spin coating technology, and carrying out heat treatment to obtain a fluorine-free / fluorine-containing bilayer precursor film; and 5, carrying out heat treatment on the fluorine-free / fluorine-containing bilayer precursor film to obtain the REBCO superconductive film. The production method is simple, allows the produced high-temperature superconductive REBCO film to have sharp cubic orientation and excellent superconductive performance, and improves the current carrying performance of the high-temperature superconductive REBCO film at 77 K.

Description

technical field [0001] The invention belongs to the technical field of high-temperature superconducting materials, and in particular relates to a preparation method of a high-temperature superconducting REBCO thin film. Background technique [0002] The coated conductor is a multi-layer composite material composed of metal substrate / buffer layer / superconducting layer / protective layer. Due to its excellent current-carrying capacity under high fields, it will be the only hope for high-temperature superconducting materials to truly realize the application of strong electricity in the liquid nitrogen temperature zone. In recent years, it has been the core superconducting material developed by developed countries. At present, REBa is prepared by low-cost chemical solution deposition technology. 2 Cu 3 o y (REBCO) superconducting layer has become one of the research hotspots. [0003] The preparation of high-temperature superconducting REBCO thin films by chemical solution dep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/45C04B35/622
CPCC04B35/4508C04B35/62222C04B2235/3215C04B2235/3225C04B2235/775
Inventor 金利华冯建情李成山王耀张平祥
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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