Method for preparing NiO/SmBiO3 composite buffer layer thin film of high-temperature super-conduction coating conductor on biaxially-textured NiW alloy substrate

A composite buffer layer and high-temperature superconducting technology, applied in the manufacture/processing of superconductor devices, etc., can solve the problems of complex buffer layer process, high cost, and unsuitability for large-scale deposition, and achieve suitable for large-scale deposition, low cost, and The effect of improving texture

Inactive Publication Date: 2012-09-19
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, the structure of the traditional coated conductor is CeO2 / YSZ / CeO2 / Ni-based alloy, CeO2 / YSZ / Y2O3 / Ni-based alloy, and CeO2 / La 2 Zr 2 o 7 / Ni-based alloy, CeO2 / Ga 2 Zr 2 o 7 / Ni-based alloys. Most of their buffer layers are prepared by physical methods, which makes the preparation of the buffer layer complex, costly, and unsuitable for large-scale deposition.

Method used

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  • Method for preparing NiO/SmBiO3 composite buffer layer thin film of high-temperature super-conduction coating conductor on biaxially-textured NiW alloy substrate
  • Method for preparing NiO/SmBiO3 composite buffer layer thin film of high-temperature super-conduction coating conductor on biaxially-textured NiW alloy substrate
  • Method for preparing NiO/SmBiO3 composite buffer layer thin film of high-temperature super-conduction coating conductor on biaxially-textured NiW alloy substrate

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Experimental program
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Effect test

Embodiment 1

[0029] The preparation method of this example consists of the following steps in turn:

[0030] a. Surface corrosion modification of the NiW alloy substrate: after the annealed biaxially textured NiW alloy (200) substrate has been washed with alcohol and acetone, it is suspended and dipped in a diluted nitric acid solution with a concentration of 30% for 40, Take it out, wash it, and let it dry. Then suspend and immerse it in a mixed modification solution prepared with 150 volumes of hydrogen peroxide and 1 volume of ammonia water for 20 seconds, take it out, wash it, and dry it in the air;

[0031] b. Oxidation heat treatment: Rapidly raise the temperature of the tubular atmosphere sintering furnace to 740°C. When the temperature and the flow rate of the atmosphere are stable, push the corroded and modified NiW alloy (200) substrate into the furnace. After the time in the process reaches 50 minutes, the oxidized base tape is pushed out from the furnace and cooled to room tem...

Embodiment 2

[0038] NiO / SmBiO3 Composite buffer layer preparation steps are:

[0039] a. Surface corrosion modification of the NiW alloy substrate: after the annealed biaxially textured NiW alloy (200) substrate, after being washed with alcohol and acetone successively, it is suspended and immersed in a diluted nitric acid solution with a concentration of 40% for 60s. Take it out, wash it, and let it dry. Then suspend and immerse it in a mixed modification solution prepared with 150 volumes of hydrogen peroxide and 2 volumes of ammonia water for 40 seconds, take it out, wash it, and dry it in the air;

[0040] b. Oxidation heat treatment: Rapidly raise the temperature of the tubular atmosphere sintering furnace to 770°C. When the temperature and the flow rate of the atmosphere are stable, push the corroded and modified NiW alloy (200) substrate into the furnace. After the time in the process reaches 40 minutes, the oxidized base tape is pushed out from the furnace and cooled to room tempe...

Embodiment 3

[0047] NiO / SmBiO3 Composite buffer layer preparation steps are:

[0048] a. Surface corrosion modification of the NiW alloy substrate: after the annealed biaxially textured NiW alloy (200) substrate, after being washed with alcohol and acetone successively, it was suspended and dipped in a diluted nitric acid solution with a concentration of 50% for 120s. Take it out, wash it, and let it dry. Then suspend and immerse it in a mixed modification solution prepared with 150 volumes of hydrogen peroxide and 4 volumes of ammonia water for 60 seconds, take it out, wash it, and dry it in the air;

[0049] b. Oxidation heat treatment: Rapidly raise the temperature of the tubular atmosphere sintering furnace to 800°C. When the temperature and the flow rate of the atmosphere are stable, push the corroded and modified NiW alloy (200) substrate into the furnace. After the time in the process reaches 20 minutes, the oxidized base tape is pushed out from the furnace and cooled to room tempe...

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Abstract

The invention discloses a method for preparing a NiO/SmBiO3 composite buffer layer thin film of a high-temperature super-conduction coating conductor on a biaxially-textured NiW alloy substrate. A preparation method of a composite buffer layer comprises the following steps of: a, surface corrosion modification of a NiW alloy (200) substrate; b, oxidation heat treatment of a NiO buffer layer; c, preparation of a SmBiO3 buffer layer colloid; d, coating of a SmBiO3 buffer layer; and e, sintering and phase forming of the SmBiO3 buffer layer. According to the method, the NiO buffer layer is prepared by using an auto-oxidation extension preparation method which is low in manufacturing cost and easy in process, a high-quality NiO (200) buffer layer thin film is easy to manufacture, thickness is easy to control, and an effect of a coating conductor buffer layer can be effectively achieved. The SmBiO3 buffer layer which grows on the NiO buffer layer is prepared in air by using a chemical solution deposition method in which nitrate serves as a precursor, and the method is low in cost and applicable to large-scale deposition. A preparation process of the composite buffer layer, particularly the SmBiO3 buffer layer, breaks shackles of other foreign coating conductor composite buffer layer preparation processes and plays a positive promotion role in research and application process of the second-generation high-temperature super-conduction coating conductor of China.

Description

technical field [0001] The invention belongs to the technical field of high-temperature superconducting material preparation, and in particular relates to a preparation technology of a high-temperature superconducting coated conductor composite buffer layer film. Background technique [0002] Take YBa 2 Cu 3 o 7-X The second-generation high-temperature superconducting coated conductor represented by (YBCO) has a higher critical current density and better superconducting performance in a magnetic field than the first-generation BSCCO-based superconducting tape. Motors and superconducting transformers will have great application prospects. Developed countries will vigorously promote the research and practical application of second-generation high-temperature superconductors based on their own technological innovation and long-term interests in electric energy. The international competition is becoming more and more fierce. [0003] Since YBCO is a hard and brittle oxide, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L39/24
Inventor 张欣赵勇程翠华张勇雷鸣王文涛
Owner SOUTHWEST JIAOTONG UNIV
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