Method for preparing YBCO (Yttrium Barium Copper Oxide) coating conductor barrier layer

A technology for coating conductors and barrier layers, applied in the field of preparation of barrier layers in second-generation high-temperature superconducting tapes, can solve the problem of high cost of barrier layers, and achieve the effects of small surface roughness, high deposition rate and low cost

Inactive Publication Date: 2011-11-16
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcoming of the high cost of the YBCO coating conductive barrier layer prepared by the prior art, and provide a method for preparing an amorphous aluminum oxide barrier layer with a low-cost chemical solution

Method used

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  • Method for preparing YBCO (Yttrium Barium Copper Oxide) coating conductor barrier layer
  • Method for preparing YBCO (Yttrium Barium Copper Oxide) coating conductor barrier layer
  • Method for preparing YBCO (Yttrium Barium Copper Oxide) coating conductor barrier layer

Examples

Experimental program
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Effect test

Embodiment 1

[0019] (1) Weigh 0.1 mol of aluminum isopropoxide, and dissolve aluminum isopropoxide in 135 mL of deionized water to prepare a solution.

[0020] (2) stirring the solution prepared in step (1) by a magnetic stirrer at 80° C. for 1 h;

[0021] (3) adding hydrochloric acid to the solution prepared in the above step (2), adjusting the pH value of the solution to 2;

[0022] (4) Stir the solution prepared in the above step (3) at 80°C for 4 hours with a magnetic stirrer to obtain a transparent Al 2 o 3 gel.

[0023] (5) the Al prepared in step (4) 2 o 3 The gel was spin-coated on the nickel-based alloy substrate at a speed of 5000 rpm, and the spin-coating time was 0.5 min;

[0024] (6) Place the film-coated substrate in step (5) in a high-temperature tubular quartz furnace, feed 500 sccm argon into the reaction chamber, raise the temperature from room temperature to 300° C. at a rate of 5° C. / h, and Keep warm for 5h, then cool the sample to room temperature with the furnac...

Embodiment 2

[0026] (1) Weigh 0.1 mol of aluminum isopropoxide, and dissolve aluminum isopropoxide in 200 mL of deionized water to prepare a solution.

[0027] (2) Stir the solution prepared in step (1) by a magnetic stirrer at 85° C. for 2 h;

[0028] (3) adding hydrochloric acid to the solution prepared in the above step (2), adjusting the pH value of the solution to 3;

[0029] (4) Stir the solution prepared in the above step (3) at 85°C for 6h with a magnetic stirrer to obtain a transparent Al 2 o 3 gel.

[0030] (5) the Al prepared in step (4) 2 o 3 The gel was spin-coated on the nickel-based alloy substrate at a speed of 5000 rpm, and the spin-coating time was 1 min;

[0031] (6) Place the film-coated substrate in step (5) in a high-temperature tubular quartz furnace, feed 500 sccm argon into the reaction chamber, heat up to 400°C from room temperature at a rate of 5°C / h, and Keep warm for 10h, then cool the sample to room temperature with the furnace. The surface morphology o...

Embodiment 3

[0033] (1) Weigh 0.1 mol of aluminum isopropoxide, and dissolve aluminum isopropoxide in 270 mL of deionized water to form a solution;

[0034] (2) Stir the solution prepared in step (1) for 3 h with a magnetic stirrer at 90° C.;

[0035] (3) adding hydrochloric acid to the solution prepared in the above step (2), adjusting the pH value of the solution to 4;

[0036] (4) Stir the solution prepared in the above step (3) at 90°C for 8 hours with a magnetic stirrer to obtain a transparent Al 2 o 3 gel.

[0037] (5) the Al prepared in step (4) 2 o 3 The gel was spin-coated on the nickel-based alloy substrate at a speed of 5000 rpm, and the spin-coating time was 1.5 min;

[0038] (6) Place the film-coated substrate in step (5) in a high-temperature tubular quartz furnace, feed 500 sccm of argon into the reaction chamber, heat up to 500°C from room temperature at a rate of 5°C / h and keep it warm 10h, then the sample was cooled to room temperature with the furnace. The surface...

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Abstract

The invention discloses a method for preparing an YBCO (Yttrium Barium Copper Oxide) coating conductor barrier layer. The method comprises the following steps of: firstly preparing a precursor liquid, mixing aluminium isopropoxide with deionized water according to a mole ratio of Al:H2O=1:50-1:100, stirring the precursor liquid by using a magnetic stirring apparatus at 80-90 DEG C, dropwise adding hydrochloric acid to the uniformly stirred precursor liquid and regulating a pH value to be 2-4; stirring the precursor liquid by using the magnetic stirring apparatus at 80-90 DEG C again to obtain transparent Al2O3 gel; coating the Al2O3 gel on a substrate; and placing the substrate coated with the Al2O3 gel in a high-temperature tubular quartz furnace, and carrying out a low-temperature thermal treatment at 300-500 DEG C under an inert atmosphere for 5-10h to obtain an amorphous alumina film. The amorphous alumina film prepared by the method disclosed by the invention is smooth and compact.

Description

technical field [0001] The invention relates to a method for preparing a barrier layer in a second-generation high-temperature superconducting strip, in particular to a method for preparing an amorphous aluminum oxide film on a nickel alloy substrate. Background technique [0002] The second-generation high-temperature superconducting tape refers to a rare-earth barium copper oxide superconducting coating conductor mainly composed of YBCO-123 superconducting materials. It is composed of a metal alloy base band, a seed layer, a barrier layer, a cap layer, a rare earth barium copper oxide superconducting layer, a protective layer and a stable layer, and is a multilayer structure. Compared with the first-generation Bi-based high-temperature superconducting tape, the second-generation high-temperature superconducting tape has the ability to carry high current under high magnetic field, and can be applied under higher temperature and magnetic field. The focus of competing resear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C20/08
Inventor 丁发柱古宏伟张腾戴少涛
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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