Yttrium barium copper oxide fluorine-free sol and preparation of high temperature superconducting film

A high-temperature superconducting film, yttrium barium copper oxide technology, applied in the field of microelectronic materials, can solve the problem of reducing the preparation efficiency of YBCO superconducting film, up to ten or even dozens of hours, up to ten or even dozens of hours, etc. problems, to achieve the effect of shortening the heat treatment time, uniform performance and low porosity

Inactive Publication Date: 2009-07-08
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the trifluoroacetate-metal-organic deposition method uses fluorine-containing raw materials in the process of preparing YBCO thin films, and a large amount of corrosive hydrofluoric acid (HF) gas will be generated during the thermal decomposition of the gel film, which seriously affects the final The surface quality of the film, and its thermal decomposition time is as long as ten or even tens of hours; although the macromolecular metal butyrate method eliminates BaCO 3 However, due to the complexity

Method used

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  • Yttrium barium copper oxide fluorine-free sol and preparation of high temperature superconducting film
  • Yttrium barium copper oxide fluorine-free sol and preparation of high temperature superconducting film
  • Yttrium barium copper oxide fluorine-free sol and preparation of high temperature superconducting film

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Embodiment 1

[0071] Take yttrium acetate, methanol, and diethylenetriamine at a molar ratio of 1:10:1.5, respectively, dissolve yttrium acetate in methanol, then add diethylenetriamine, and stir to dissolve to form solution A; at a molar ratio of 1:10: 3. Take barium acetate, methanol and lactic acid respectively, dissolve barium acetate in methanol, then add lactic acid, stir and dissolve at 25°C to form solution B; take copper acetate, methanol and Acrylic acid, dissolve copper acetate in methanol, add acrylic acid, stir and dissolve at 25°C to form solution C; mix and stir the prepared solution A, solution B and solution C to obtain yttrium barium copper oxide fluorine-free sol, Control the molar ratio of yttrium ion, barium ion and copper ion in the yttrium barium copper oxide fluorine-free sol to be 1:2:3; The body was pulled and coated on a single crystal LAO (001) substrate to prepare a layer of yttrium barium copper oxide gel film. The yttrium-barium-copper-oxygen gel film was pla...

Embodiment 2

[0073]Take yttrium acetate, ethylene glycol methyl ether and ethanolamine respectively at a molar ratio of 1:40:5, dissolve yttrium acetate in ethylene glycol methyl ether, then add ethanolamine, stir and dissolve to form solution A; molar ratio 1: 80:5, take barium hydroxide, ethylene glycol methyl ether and lactic acid respectively, dissolve barium hydroxide in ethylene glycol methyl ether, then add lactic acid, stir and dissolve at 40°C to form solution B; Ratio 1:40:10, take copper acetate, ethylene glycol methyl ether and α-methacrylic acid respectively, dissolve copper acetate in ethylene glycol methyl ether, then add α-methacrylic acid, and stir at 40°C After dissolving, solution C is formed; the prepared solution A, solution B and solution C are mixed and stirred to obtain yttrium barium copper oxide fluorine-free sol, and the yttrium ion, barium ion and copper ion in the yttrium barium copper oxide fluorine-free sol are controlled The molar ratio is 1:2:4; at room tem...

Embodiment 3

[0075] According to the molar ratio of 1:25:3.2, take yttrium acetate, ethanol and diethanolamine respectively, dissolve yttrium acetate in ethanol, then add diethanolamine, stir and dissolve to form solution A; according to the molar ratio of 1:45:4, respectively Take barium acetate, ethanol and lactic acid, dissolve barium acetate in ethanol, then add lactic acid, stir and dissolve at 35°C to form solution B; take copper acetate, ethanol and acrylic acid respectively in a molar ratio of 1:25:6 acid, dissolve copper acetate in ethanol, then add propionic acid, stir and dissolve at 35°C to form solution C; mix and stir the prepared solution A, solution B and solution C to obtain yttrium barium copper oxide Fluoride-free sol, control the molar ratio of yttrium ion, barium ion and copper ion in this yttrium barium copper oxide fluorine-free sol to be 1:2:3.6; Fluorosol is used as a precursor, and a yttrium barium copper oxide gel film is prepared on a lanthanum aluminate single ...

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Abstract

The invention discloses a method for preparing yttrium barium copper oxide fluorine-free sol and a high-temperature superconductive membrane. The mol ratio of the following compositions of the fluorine-free sol, namely yttrium acetate to barium acetate or barium hydroxide to copper acetate to diethylenetriamine or ethanolamine or diethanolamine or trolamine to lactic acid to acrylic acid or alpha-methacrylic acid or metacetonic acid to methanol or ethylene glycol monomethyl ether or ethanol, is 1:2:3-4:1.5-5:6-10:6-40:60-360. The method for preparing the superconductive membrane is to adopt different complexing agents to dissolve acetate in a solvent to prepare the yttrium barium copper oxide fluorine-free sol, adopt a crystal pulling method to prepare the fluorine-free sol into a yttrium barium copper oxide gel membrane, perform heat treatment on the gel membrane, and prepare the yttrium barium copper oxide high-temperature superconductive membrane. During preparation of the membrane from the sol, the pyrolysis process is not required; the whole heat treatment time is shortened by approximately 10 hours compared with the prior fluorine-containing technology; and no corrosive HF gas is generated during preparation of the membrane, so that environmental pollution is low.

Description

technical field [0001] The invention belongs to the technical field of microelectronic materials, and relates to a sol for preparing high-temperature superconducting films, in particular to a fluorine-free yttrium-barium-copper-oxygen sol, and the invention also relates to the preparation of yttrium-barium-copper-oxygen high-temperature super method of directing thin films. Background technique [0002] Yttrium barium copper oxide is a high temperature superconducting material that can be applied in the liquid nitrogen temperature zone, and its chemical formula is YBa 2 Cu 3 o 7-δ , abbreviated as YBCO. YBCO high-temperature superconducting thin film has excellent electromagnetic properties, especially under high field, it has a higher critical current density than the first-generation bismuth-based tape. High, precise and sophisticated electronic devices, such as superconducting quantum interferometer (SQUID), Josephson junctions, superconducting coupled antenna, superc...

Claims

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Application Information

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IPC IPC(8): C04B35/45C04B35/624H01B12/00
CPCY02E40/64Y02E40/60
Inventor 赵高扬雷黎陈源清
Owner XIAN UNIV OF TECH
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