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YBCO superconductive film with multi-layer composite structure and preparation method of film

A multi-layer composite, superconducting film technology, applied in the manufacture/processing of superconductor devices, superconductor parts, etc., can solve the problem of limited current-carrying capacity of YBCO coating, reduce production cost, improve current-carrying capacity, widen Application-wide effects

Active Publication Date: 2013-02-13
SUZHOU NEW MATERIAL INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the patent has prepared a YBCO thick film, the thickness is only 1 micron, which is limited to improve the current carrying capacity of the YBCO coating

Method used

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  • YBCO superconductive film with multi-layer composite structure and preparation method of film
  • YBCO superconductive film with multi-layer composite structure and preparation method of film
  • YBCO superconductive film with multi-layer composite structure and preparation method of film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Configuration of YBCO precursor solution:

[0035] A. Weigh 0.005 mol, 0.01 mol and 0.015 mol of yttrium acetate, barium acetate and copper acetate respectively, mix yttrium acetate, barium acetate and copper acetate and dissolve in 100ml deionized water containing 10mol% trifluoroacetic acid to prepare solution; after being stirred by a magnetic stirrer for 1 h, the solvent was evaporated by a rotary evaporator to obtain a gel;

[0036] B. Add 30 mL of methanol to the above gel, stir it with a magnetic stirrer for 0.5 h, and then use a rotary evaporator to remove the solvent to further remove impurities such as water to obtain a very pure gel;

[0037] C. adding the gel prepared in step B into 20 ml of methanol to make Y, Ba and Cu three kinds of metal total ion concentration is the precursor solution of 1.5 mol / L;

[0038] (2) Thin film coating I: The precursor solution prepared in step (1) was spin-coated on the strontium titanate single crystal substr...

Embodiment 2

[0046] (1) Configuration of YBCO precursor solution:

[0047] A. Weigh 0.01 mol, 0.02 mol and 0.03 mol of yttrium acetate, barium acetate and copper acetate respectively, mix yttrium acetate, barium acetate and copper acetate and dissolve in 200ml deionized water containing 20mol% trifluoroacetic acid to prepare solution; the solution was stirred by a magnetic stirrer for 2 h, and then the solvent was evaporated by a rotary evaporator to obtain a gel;

[0048] B. Add 60 mL of methanol to the prepared gel, stir with a magnetic stirrer for 1 h, and then use a rotary evaporator to remove the solvent to further remove impurities such as water to obtain a very pure gel;

[0049] C. adding the obtained pure gel into 30 ml of methanol to make Y, Ba and Cu three kinds of metal total ion concentration as the precursor solution of 2 mol / L;

[0050] (2) Thin film coating I: spin-coat the precursor solution prepared in step (1) on the lanthanum aluminate single crystal substrat...

Embodiment 3

[0059] (1) Configuration of YBCO precursor solution:

[0060] A. Weigh 0.015 mol, 0.03 mol and 0.045 mol of yttrium acetate, barium acetate and copper acetate respectively, mix yttrium acetate, barium acetate and copper acetate and dissolve in 300ml deionized water containing 30mol% trifluoroacetic acid to prepare solution; the solution was stirred by a magnetic stirrer for 3 h, and then the solvent was evaporated by a rotary evaporator to obtain a gel;

[0061] B. Add 90 mL of methanol to the prepared gel, stir with a magnetic stirrer for 1.5 h, and then use a rotary evaporator to remove the solvent to further remove impurities such as water to obtain a very pure gel;

[0062] C. adding the obtained pure gel to 30 ml of methanol to make Y, Ba and Cu three kinds of metal total ion concentration is the precursor solution of 3.0 mol / L;

[0063] (2) The prepared precursor solution was spin-coated on the magnesium oxide single crystal substrate at a speed of 4500 rpm, a...

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Abstract

The invention provides an YBCO superconductive film with a multi-layer composite structure and a preparation method of the film. The method comprises the following steps of: firstly, mixing and dissolving ytterbium acetate hydrate, barium acetate and copper acetate in aqueous solution of trifluoroacetic acid according to the proportion; stirring evenly, evaporating the dissolvent to dryness under vacuum condition to obtain gel; adding methyl alcohol, stirring evenly and evaporating the dissolvent to dryness to obtain the gel; then, adding methyl alcohol to prepare precursor solution; coating the precursor solution on a substrate; carrying out low-temperature thermal treatment on the coated film firstly to decompose the trifluoro acetate; then, carrying out high-temperature thermal treatment to obtain a tetragonal YBCO film; coating the precursor solution of the titanium acetylacetonate on the the YBCO film, and carrying out high-temperature thermal treatment; and orderly coating the precursor solution of Y, Ba and Cu and the precursor solution of the titanium acetylacetonate on the film, and carrying out corresponding thermal treatment to prepare the YBCO superconductive film with the thickness of seven layers, wherein the structure of the YBCO superconductive film is YBCO / BaTiO3 / YBCO / BaTiO3 / YBCO / BaTiO3 / YBCO. The critical electric current density of the YBCO thick film reaches 4.0MA / cm<2> in the null field, thus, current-carrying capability of the YBCO thick film is improved greatly.

Description

technical field [0001] The invention relates to a high-temperature superconducting film and a preparation method thereof, in particular to a YBCO superconducting film with a multilayer composite structure and a preparation method thereof. Background technique [0002] In 2010, Zhu Jingwu's group discovered the yttrium-barium-copper-oxygen superconductor whose superconducting transition temperature broke through the "temperature barrier" (77K) of liquid nitrogen. YBa2Cu3O7-x (YBCO) is a typical representative of high-temperature superconductors. Due to its own advantages, it has a high irreversible field (7T) and a high current-carrying capacity (0.1~10MA / cm2) in the liquid nitrogen temperature range of 77K. ), low AC loss and other advantages, once discovered, scientists have aroused great interest in its research, and the commercialization of YBCO will also bring revolutionary progress to the power system. BiSrCaCuO (BSCCO) was commercialized in the late 1990s and is known...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L39/12H01L39/24H10N60/85H10N60/01
Inventor 蔡渊贺昱旻周莉艾青程鹏古宏伟丁发柱
Owner SUZHOU NEW MATERIAL INST
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