High-temperature superconducting nanometer composite film and method for preparing same

A high-temperature superconducting thin film and nanocomposite technology, applied in the usage of superconducting elements, superconducting devices, superconducting/high-conducting conductors, etc., can solve problems such as economical infeasibility, widen applications, and improve critical current density. Effect
CN101747031AActive Publication Date: 2010-06-23GRIMAT ENG INST CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GRIMAT ENG INST CO LTD
Publication Date
2010-06-23

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Abstract

The invention provides a method for preparing a high-temperature superconducting nanometer composite film, which comprises the following steps: preparing a precursor liquid, mixing Y(CH3COO)3, Ba(CH3COO) and Cu(CH3COO) in a molar ratio of 1:2:3 and dissolving the mixture in 20 to 30 mol percent aqueous solution of trifluoroacetic acid; uniformly stirring the solution and drying a solvent by distillation to obtain gel; then adding methanol in the gel, uniformly stirring the mixture, drying the solvent by distillation to obtain gel; adding methanol and zirconium(IV) acetylacetonat in an amount of 5 to 8 mol percent based on the total ion concentration of three metals to prepare precursor liquid, and the coating the precursor liquid on a monocrystal oxidate substrate with a two-inch diameter by the method of rotatable coating or lifting and pulling. The coated film is subjected to low temperature thermal treatment at 400 and 410 DEG C first to decompose trifluoroacetate, and finally the YBCO film containing nanometer barium zirconate is formed through the thermal treatment at the high temperature of between 800 and 850 DEG C and the annealing process at the temperature of between 490 and 510 DEG C.
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Description

technical field

[0001] The invention relates to a large-area high-temperature superconducting nanocomposite film and a preparation method thereof, in particular to preparing the yttrium barium copper oxide-barium zirconate nanocomposite film by using a trifluoroacetate-metal organic deposition method (TFA-MOD). Background technique

[0002] The second-generation high-temperature superconducting tape refers to a rare-earth barium copper oxide superconducting coating conductor mainly composed of YBCO-123 superconducting materials. Compared with the first-generation Bi-based high-temperature superconducting tape, the second-generation high-temperature superconducting tape has the ability to carry high current under high magnetic field, and can be applied under higher temperature and magnetic field. The focus of competing research and development in the field. At present, many methods including physical and chemical methods can be used to prepare YBCO superconducting coatings. ...

Claims

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