Method for preparing wide-crack spacing REBCO high-temperature superconducting thick films using YBCO/LAO seed films

A superconducting, thick-film technology, applied in the usage of superconducting elements, manufacturing/processing of superconducting devices, superconducting devices, etc., can solve the problems of unfavorable design and development of superconducting devices, large mismatch degree, etc., and achieve the goal of promoting In the field of design and research and development, the effect of small lattice mismatch and good repeatability

Inactive Publication Date: 2015-06-17
SHANGHAI JIAOTONG UNIV
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Problems solved by technology

However, for the YBCO / MgO film, there is a large mismatch between the MgO substrate and the YBCO film; for the NGO film, the REBCO superconducting thick film induced to grow usually has dense cracks, that is, the crack spacing is very narrow, usually only tens of microns, this defect is very unfavorable for the design and development of superconducting devices

Method used

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Embodiment Construction

[0028] In the first embodiment of the present invention, adopt the method for growing REBCO superconducting thick film of the present invention to grow YBCO superconducting thick film, concrete steps are:

[0029] The first step is to take BaCO 3 powder and CuO powder for batching to obtain BaCO 3 +CuO powder, BaCO 3 The molar ratio of Ba and Cu in +CuO powder is 0.6.

[0030] Concrete BaCO 3 The amount of powder and CuO powder can be determined according to the YBCO superconducting thick film to be grown, and the BaCO obtained after the batching is completed 3 The molar ratio of Ba and Cu in +CuO powder is 0.6. Among them, BaCO 3 +CuO powder is made of BaCO 3 Powder obtained by mixing powder and CuO powder.

[0031] The second step, the BaCO obtained through the first step 3 +CuO powder is pretreated and then sintered to form Ba-Cu-O powder.

[0032] First, for the BaCO obtained through the first step 3+CuO powder for pretreatment, pretreatment includes:

[0033] 1...

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Abstract

The invention relates to a method for preparing wide-crack spacing REBCO high-temperature superconducting thick films using YBCO / LAO seed films. The invention discloses a method for growing REBCO superconducting thick films by liquid-phase epitaxy, comprising the following steps: taking BaCO3 powder and CuO powder to prepare and obtain BaCO3 and CuO powder; pre-processing the BaCO3 and CuO powder and sintering to form Ba-Cu-O powder; adding the Ba-Cu-O powder into a crucible filled with RE2O3 materials, heating and keeping the temperature to obtain RE-Ba-Cu-O solution; cooling the RE-Ba-Cu-O solution, using YBCO / LAO thin films as seed films, and growing REBCO superconducting thick films by liquid-phase epitaxy with the top seeded solution growth. The method proves the feasibility for growing the REBCO superconducting thick films by liquid-phase epitaxy with the YBCO / LAO seed films and the advantages of the seed films so as to explore and get novel seed crystal materials for growing the REBCO superconducting thick films by liquid-phase epitaxy and have import meanings for research and development of high-temperature superconducting devices.

Description

technical field [0001] The invention relates to a method for preparing a high-temperature superconducting material, in particular to a method for preparing a REBCO superconducting thick film with a wide crack spacing. Background technique [0002] First discovered in 1911, superconductors have two main properties: zero electrical resistance and complete diamagnetism. These peculiar properties make it have application potential in many fields, for example, in the power industry, superconducting cables can be used to realize lossless power transmission, superconducting motors can break through the limit capacity of conventional generators; superconducting coils made of superconducting The magnet is not only small in size and light in weight, but also has low loss, requires low excitation power, and can obtain a strong magnetic field. However, its extremely low temperature greatly limits its application, so the development of superconductors with higher critical temperatures h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B19/00C30B29/22H01B12/06H01L39/12H01L39/24C04B35/45
CPCY02E40/60
Inventor 姚忻郭林山陈媛媛程玲
Owner SHANGHAI JIAOTONG UNIV
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