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Gd-Sm doped YBCO superconducting layer and preparation method thereof

A technology of yttrium barium copper oxide and superconducting layer, applied in the field of superconducting, to achieve the effect of overcoming the thickness effect, precise composition control and high production efficiency

Inactive Publication Date: 2018-04-10
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The present invention provides a yttrium-barium-copper-oxygen superconducting layer doped with gadolinium and samarium double elements, and a preparation method by chemical solution deposition method. The element composition and preparation method of the superconducting layer involved have not been reported so far.

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  • Gd-Sm doped YBCO superconducting layer and preparation method thereof
  • Gd-Sm doped YBCO superconducting layer and preparation method thereof

Examples

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Embodiment 1

[0020] In this embodiment, a ReBCO superconducting layer with a thickness of 1 μm is prepared on an LAO substrate. The conventional metal-organic solution deposition process is carried out by dipping puller equipment. The specific process is as follows:

[0021] (1) Dissolve the five acetates of yttrium acetate, gadolinium acetate, samarium acetate, barium acetate, and copper acetate in the deionized ratio of Y:Gd:Sm:Ba:Cu=0.8:0.1:0.1:2:3.15 water to obtain solution A;

[0022] (2) Add an appropriate amount of propionic acid to A, and stir evenly to make it fully react, and then repeatedly distill the solution under vacuum at 70°C to obtain solution B;

[0023] (3) Add methanol to solution B, adjust the concentration of the solution to 1.5mol / L, and add PVB as a thickener, the mass ratio of the thickener to the solution is 1:20, stir evenly, and obtain a blue-black transparent colloidal precursor liquid;

[0024] (4), using dipping and pulling machine for coating, the dipp...

Embodiment 2

[0028] In this embodiment, a ReBCO superconducting layer with a thickness of 2 μm is prepared on an LAO substrate. The conventional metal-organic solution deposition process is carried out by dipping puller equipment. The specific process is as follows:

[0029] The preparation method of the present embodiment is different from embodiment 1 except that steps (1) and (4) are different, and all the other repeat the steps in embodiment 1, and concrete process is as follows:

[0030] (1) Dissolve the five acetates of yttrium acetate, gadolinium acetate, samarium acetate, barium acetate, and copper acetate in the deionized ratio of Y:Gd:Sm:Ba:Cu=0.7:0.2:0.1:2:3.15 water to obtain solution A;

[0031] (2), repeat step (2) among the embodiment 1;

[0032] (3), add methanol to solution B, adjust the solution concentration to 1.5mol / L, and add PVB as a thickener, the mass ratio of the thickener to the solution is 1:18, stir evenly, and obtain a blue-black transparent colloidal precu...

Embodiment 3

[0037] In this embodiment, a ReBCO superconducting layer with a thickness of 3 μm is prepared on an LAO substrate. The conventional metal-organic solution deposition process is carried out by dipping puller equipment. The specific process is as follows:

[0038] The preparation method of the present embodiment is different from embodiment 1 except that steps (1) and (4) are different, and all the other repeat the steps in embodiment 1, and concrete process is as follows:

[0039] (1) Dissolve the five acetates of yttrium acetate, gadolinium acetate, samarium acetate, barium acetate, and copper acetate in the deionized ratio of Y:Gd:Sm:Ba:Cu=0.6:0.3:0.1:2:3.15 water to obtain solution A;

[0040] (2), repeat step (2) among the embodiment 1;

[0041] (3), add methanol to solution B, adjust the solution concentration to 1.5mol / L, and add PVB as a thickener, the mass ratio of the thickener to the solution is 1:16, stir evenly, and obtain a blue-black transparent colloidal precu...

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Abstract

The invention provides a Gd-Sm doped YBCO superconducting layer and a preparation method thereof, particularly relates to a method for preparing a (YxGdySmz) BCO superconducting layer on a LaO substrate by combining Gd ions with Sm ions to partially replace Y ions, and aims to effectively overcome the thickness effect of a YBCO superconducting layer and improve the superconducting current-carryingcapacity. The preparation method comprises the following steps: at first, preparing a metal precursor solution by utilizing the organic metal solution deposition technology; then, carrying out dip coating on the LaO substrate for several times by utilizing a dip coating machine; and carrying out heat treatment and annealing treatment on a coated sample, so as to obtain the (YxGdySmz) BCO superconducting layer grown on the LaO substrate. By utilization of the preparation method, the (YxGdySmz) BCO superconducting layer of which the thickness reaches 5 micrometers and the current-carrying capacity is high can be produced, and the critical current can reach 500 A / cm.

Description

technical field [0001] The invention relates to the field of superconducting technology, in particular to a yttrium-barium-copper-oxygen superconducting layer doped with gadolinium and samarium and a preparation method thereof, in particular to growing on a lanthanum aluminate substrate by organic metal solution deposition (Y x Gd y SM z ) method for BCO superconducting layer, and (Y) prepared by this method x Gd y SM z ) BCO coated conductor. Background technique [0002] At present, the power supply is becoming increasingly tense, and a large amount of power is wasted on traditional cables. If superconducting strips are used, not only power loss can be avoided, but also a large amount of metal materials can be saved. Today's research hotspots on superconducting strips are the second-generation high-temperature superconducting materials based on the YBCO (yttrium barium copper oxide) system. Filters, etc.) and the field of strong electricity (such as the preparation ...

Claims

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Application Information

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IPC IPC(8): C23C18/12H01B12/06
CPCC23C18/1216C23C18/1245H01B12/06Y02E40/60
Inventor 徐鑫朱科翔梁嘉吉刘胜利
Owner NANJING UNIV OF POSTS & TELECOMM
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