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A method for rapid preparation of rebco superconducting film by extremely low fluorine mod method

A superconducting film, extremely low technology, applied in the field of preparation of the second-generation high-temperature superconducting coated conductor REBCO, can solve the problems of superconducting layer void composition, poor performance superconducting film, film surface deterioration, etc. Solution rate, time shortening, effect of shortening heat treatment process

Active Publication Date: 2017-08-11
SHANGHAI UNIV
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Problems solved by technology

[0006] At present, the fluorine content in the precursor solution of the traditional TFA-MOD method is relatively high, and the excessively fast heating rate will lead to the release of a large number of HF gas clusters, which will easily cause the deterioration of the film surface and the internal voids and component segregation of the superconducting layer. Finally, Poor superconducting film

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  • A method for rapid preparation of rebco superconducting film by extremely low fluorine mod method
  • A method for rapid preparation of rebco superconducting film by extremely low fluorine mod method
  • A method for rapid preparation of rebco superconducting film by extremely low fluorine mod method

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Embodiment Construction

[0025] Preferred embodiments of the present invention are described in detail as follows:

[0026] In this example, see Figure 1 ~ Figure 4 , a method for rapidly preparing a REBCO superconducting film by an extremely low-fluorine MOD method, comprising the steps of:

[0027] a. by the mol ratio of RE:Ba:Cu=1:1.5:3, take respectively yttrium acetate tetrahydrate, barium acetate and copper acetate monohydrate of 0.005mol, 0.0075mol and 0.015mol;

[0028] b. Mix and dissolve all the rare earth acetates, all copper acetate and 2 / 3 barium acetate weighed in step a in deionized water, stir well and then add an excess of 1 times propionic acid, and then stir for 2 The mixed solution was fully reacted in 1 hour, and then the solvent was distilled off with a rotary evaporator to obtain a gel under reduced pressure;

[0029] c. Dissolve the other 1 / 3 of the barium acetate weighed in step a in deionized water, stir well and then add an excess of 30% trifluoroacetic acid, stir to make...

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Abstract

The invention discloses a method for rapidly preparing an REBCO superconducting film by an extremely-low-fluorine MOD (metal organic deposition) method and is applied to the technical field of second-generation high-temperature superconducting coated conductor REBCO preparation. On the basis of a traditional full-fluorine MOD method, the method has the advantages that propanoic acid is used for substituting for trifluoroacetic acid to treat most of acetate, and fluorine content in a precursor solution is as low as F / Ba=2; a cation stoichiometric ratio satisfies that RE:Ba:Cu=1:1.5:3, so that the fluorine content in the precursor solution is decreased to a current minimum value of 7%; since the extremely-low-fluorine precursor solution is used for preparing the high-temperature REBCO superconducting film, a low-temperature pyrolysis treatment rate can be increased from traditional 0.2-0.5 DEG C / min to 20-25 DEG C / min, the REBCO superconducting film good in overall performance can be obtained, and time for a whole heat treatment process is shortened by about 10 hours.

Description

technical field [0001] The invention relates to a second-generation high-temperature superconducting tape preparation method, in particular to a rapid preparation method of a REBCO superconducting film, which is applied in the technical field of preparation of the second-generation high-temperature superconducting coating conductor REBCO. Background technique [0002] Based on REBa 2 Cu 3 o 7-δ (REBCO) The second-generation high-temperature superconducting tape developed by thin film epitaxial growth and biaxial texture technology has a high irreversible field and a high critical current density in the liquid nitrogen temperature region. It is used in the fields of electricity, energy, and medical treatment. It has a very broad application prospect. In line with the innovation needs and long-term interests of the power energy industry, countries are currently actively implementing strategic plans aimed at promoting the commercialization and power applications of second-ge...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00H01B12/06
CPCY02E40/60
Inventor 蔡传兵李敏娟刘志勇白传易
Owner SHANGHAI UNIV
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