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Method for preparing yttrium-barium-copper-oxygen high-temperature superconducting film

A high-temperature superconducting and yttrium-barium-copper-oxygen technology is applied in the field of preparation of high-temperature superconducting thin films to achieve low preparation costs, be conducive to industrial production, and be environmentally friendly.

Active Publication Date: 2012-10-17
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to overcome the shortcoming of releasing HF corrosive gas in the YBCO superconducting thin film process prepared by the existing TFA-MOD method, and provide an environmentally friendly method for preparing YBCO superconducting thin film

Method used

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  • Method for preparing yttrium-barium-copper-oxygen high-temperature superconducting film
  • Method for preparing yttrium-barium-copper-oxygen high-temperature superconducting film
  • Method for preparing yttrium-barium-copper-oxygen high-temperature superconducting film

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Experimental program
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Effect test

Embodiment 1

[0026] (1) Weigh yttrium acetate, barium acetate and copper acetate to be 0.005mol, 0.01mol and 0.015mol respectively, mix yttrium acetate, barium acetate and copper acetate and dissolve them in 100ml deionized water containing 10mol% acetic acid to form Solution, the solution that makes Y, Ba and Cu three kinds of metal total ion concentrations is 0.3mol / L;

[0027] (2) Stir the acetate solution prepared in step (1) for 1 h with a magnetic stirrer, and then use a rotary evaporator to evaporate the solvent to obtain a gel;

[0028] (3) Add the gel prepared in the step (2) into 50ml of methanol, stir with a magnetic stirrer for 0.5h, and then use a rotary evaporator to evaporate the solvent to further remove impurities such as moisture to obtain a pure gel ;

[0029] (4) the gel that described step (3) is made joins in the mixed solution of 15ml triethanolamine and 5ml terpineol, makes the solution that Y, Ba and Cu three kinds of metal total ion concentrations are 1.5mol / L ;...

Embodiment 2

[0036] (1) Weigh yttrium acetate, barium acetate and copper acetate to be 0.01mol, 0.02mol and 0.03mol respectively, mix yttrium acetate, barium acetate and copper acetate and dissolve in 100ml deionized water containing 20mol% acetic acid to form a solution , making Y, Ba and Cu three kinds of metal total ion concentrations are the solution of 0.6mol / L;

[0037](2) Stir the acetate solution prepared in step (1) for 2 hours with a magnetic stirrer, and then use a rotary evaporator to remove the solvent to obtain a gel;

[0038] (3) Add the gel prepared in the step (2) into 100ml of methanol, stir it with a magnetic stirrer for 1 hour, and then use a rotary evaporator to remove the solvent to further remove impurities such as water to obtain a pure gel;

[0039] (4) the gel that described step (3) is made is added in the mixed solution of 30ml triethanolamine and 10ml terpineol, makes the solution that Y, Ba and Cu three kinds of metal total ion concentrations are 1.5mol / L ; ...

Embodiment 3

[0046] (1) Weigh yttrium acetate, barium acetate and copper acetate to be 0.015mol, 0.03mol and 0.045mol respectively, mix yttrium acetate, barium acetate and copper acetate and dissolve in 100ml deionized water containing 30mol% acetic acid to form a solution , making Y, Ba and Cu three kinds of metal total ion concentration is the solution of 0.9mol / L;

[0047] (2) The acetate solution prepared in step (1) was stirred for 3 hours by a magnetic stirrer, and then the solvent was evaporated by a rotary evaporator to obtain a gel;

[0048] (3) Add the gel prepared in the step (2) into 100ml of methanol, stir it with a magnetic stirrer for 1.5h, and then use a rotary evaporator to evaporate the solvent to further remove impurities such as water to obtain a pure gel ;

[0049] (4) the gel that described step (3) is made is added in the mixed solution of 30ml triethanolamine and 10ml terpineol, makes the solution that Y, Ba and Cu three kinds of metal total ion concentrations are ...

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Abstract

The invention relates to a method for preparing an yttrium-barium-copper-oxygen high-temperature superconducting film. First, a precursor solution is prepared. Yttrium acetate (Y(CH3COO)3), barium acetate (Ba(CH3COO)2), and copper acetate (Cu(CH3COO)2) with a molar ratio that Y:Ba:Cu=1:2:3 are mixed in a water solution of 10-30mol% acetic acid. The mixture is well mixed, and is subjected to vacuum evaporation, such that the solvent is removed, and a gel is obtained; trolamine and terpineol are added to the gel, a proper amount of ammonia water is added, and the pH of the solution is regulated to 5-7, such that a precursor with a total concentration of the Y, Ba and Cu ions being 1.5-3.0mol / L is prepared. The precursor solution is coated on a substrate. The coated film is subjected to a low-temperature heat treatment under a temperature of 300-500 DEG C, and is then subjected to a high-temperature heat treatment under a temperature of 750-850 DEG C and an annealing treatment under a temperature of 450-550 DEG C, such that the YBCO superconducting film is formed.

Description

technical field [0001] The invention relates to a method for preparing a high-temperature superconducting thin film, in particular to a method for preparing a YBCO superconducting thin film. Background technique [0002] Among many superconducting materials, NbTi, Nb 3 Sn, Bi-2223, YBCO and MgB 2 These are five superconducting materials that may be used on a large scale. Among these five superconducting materials, only Bi-2223 and YBCO have a critical transition temperature higher than that of liquid nitrogen, which belong to high-temperature superconducting materials. The irreversible field H*(77K) of Bi-2223 at 77K is only about 0.2T, which is much smaller than the upper critical field H of 77K. c2 (77K) (perpendicular to the superconducting layer Hc 2 The order of magnitude is 50T), such a small irreversible field hinders the application of Bi-2223 at 77K. The irreversible field H*(77K) of YBCO at 77K is about 3-5T, which is much higher than that of Bi-2223. It is cu...

Claims

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Application Information

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IPC IPC(8): C04B35/45C04B35/622H01B12/00
CPCY02E40/64Y02E40/60
Inventor 丁发柱古宏伟张腾王洪艳屈飞戴少涛邱清泉蔡渊贺昱旻
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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