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Method for preparing yttrium-barium-copper-oxygen super conductive-film sol-gel

A yttrium barium copper oxide and sol technology, applied in the field of microelectronics and materials, can solve the problems of difficulty in obtaining superconductivity of thin films, long preparation process cycle, long time consumption, etc., and achieves shortened heat treatment time, easy adjustment of components, and simple preparation process. Effect

Inactive Publication Date: 2006-10-25
XIAN UNIV OF TECH
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  • Application Information

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Problems solved by technology

However, this method of slow temperature rise often takes a long time. For the preparation of thick YBCO films, it is necessary to repeat the "coating-thermal decomposition" process many times, which makes the preparation process longer.
[0004] On the other hand, whether it is a fluorine-containing sol or a fluorine-free sol, the obtained YBCO gel film will lose Cu during the heat treatment process. The thinner the gel film, the greater the loss of Cu, so that the final It is often difficult to obtain good superconductivity in thin films

Method used

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  • Method for preparing yttrium-barium-copper-oxygen super conductive-film sol-gel
  • Method for preparing yttrium-barium-copper-oxygen super conductive-film sol-gel

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preparation example Construction

[0024] The preparation method of the above-mentioned yttrium barium copper oxide high temperature superconducting film sol comprises the following steps:

[0025] 1) Dissolve yttrium acetate in methanol, add a small amount of diethylenetriamine and benzoylacetone, so that yttrium acetate:methanol:diethylenetriamine:benzoylacetone=1:(10~40):(1~5): (0~2), form solution A after stirring;

[0026] 2) Dissolve barium acetate in a mixed solution containing water and trifluoroacetic acid, so that barium acetate: water: trifluoroacetic acid = 1: (10-80): (2-5), after stirring and dissolving, after 65 ° C ~ Dry at 85°C, and dissolve the resulting product in methanol solution so that the molar ratio Ba 2+ : Methanol=1: (10~40), obtain solution B;

[0027] 3) Dissolve copper acetate in methanol, add a small amount of acrylic acid and phenylacetone, so that copper acetate: methanol: acrylic acid: benzoylacetone = 1: (10~40): (2~10): (0.1~2) , forming solution C after slight heating and...

Embodiment 1

[0036] Dissolve yttrium acetate in methanol, add diethylenetriamine so that the molar ratio of each component is: yttrium acetate:methanol:diethylenetriamine=1:27:1.5, and form solution A after stirring and clarification.

[0037] Dissolve barium acetate in a mixed liquid containing water and trifluoroacetic acid so that barium acetate: water: trifluoroacetic acid = 1:40:3. After stirring and dissolving, the substance obtained after drying at 80°C was redissolved in methanol solution so that the molar ratio Ba 2+ :methanol=1:20, and solution B was obtained after stirring and clarification.

[0038] Dissolve copper acetate in methanol, add a small amount of acrylic acid and phenylacetone to make copper acetate: methanol: acrylic acid: benzoylacetone = 1:22:2:0.2, and form solution C after slight heating and stirring.

[0039] Mix the above solutions A, B, and C, and stir, so that Y 3+ : Ba 2+ : Cu 2+ =1:2:3.2, forming the required sol.

[0040] Using the sol, a layer of ge...

Embodiment 2

[0042] Dissolve yttrium acetate in methanol, add diethylenetriamine and phenylacetone, so that the molar ratio of each component is: yttrium acetate: methanol: diethylenetriamine: phenylacetone = 1: 25: 1.5: 0.2, after Solution A was formed after stirring to clarify.

[0043] Dissolve barium acetate in a mixed solution of water and trifluoroacetic acid so that barium acetate: water: trifluoroacetic acid = 1:40:3, stir and dissolve, and dry at 75°C to form a viscous glassy substance. and redissolved in methanol solution such that the molar ratio Ba 2+ :methanol=1:16, and solution B was obtained after stirring and clarification.

[0044] Take copper acetate as raw material, dissolve it in methanol, add a small amount of propionic acid and benzoylacetone to make copper acetate: methanol: propionic acid = 1:25:3:0.2, and form solution C after slight heating and stirring.

[0045] Mix the above three solutions A, B, and C and stir, so that Y 3+ : Ba 2+ : Cu 2+ =1:2:4, forming ...

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Abstract

This invention discloses sol-gel preparation method of yttrium barium copper oxygen superconducting film. The materials are acetic yttrium, acetic barium, acetic copper, their mol ratio is that acetic yttrium 1 part, acetic barium 2 parts, acetic copper 3-4 parts, trifluoroacetic acid 4-10 parts, water 20-160 parts, acrylic acid 6-40, diethylene triamine 1-5, methanol 60-240, benzoyl acetone 1-10. Fluorine content of the sol is low, components are easy to adjust, chemical stability is good, and preparation process is simple. High temperature superconductive film made by this sol is easy to get superconductive thickness film, its technique repeatability is high, this method can be used to make large area yttrium barium copper oxygen film, the film porosity is low, surface purify is good, and good superconducting characteristic.

Description

technical field [0001] The invention relates to a film material in the field of microelectronics and materials, and relates to a superconducting film and a preparation method thereof, specifically, a sol-gel preparation method of a yttrium barium copper oxide superconducting film. Background technique [0002] The chemical formula of yttrium barium copper oxide is YBa 2 Cu 3 O 7-x , referred to as YBCO, is a high temperature superconducting material. YBCO film can be used in the field of microelectronics to make various high, precise and sharp electronic devices, such as superconducting quantum interference device (SQUID), superconducting coupled antenna (Antenna-coupled), superconducting detector (Superconductor bolometric detectors) Wait. [0003] At present, methods such as PLD, MOCVD, and magnetron sputtering are mainly used to prepare YBCO films, but expensive vacuum equipment is involved. In recent years, the sol-gel (sol-gel) method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/624C04B35/01C04B35/622H01B12/00
CPCY02E40/60
Inventor 赵高扬陈源清张黄莉
Owner XIAN UNIV OF TECH
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