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Preparation method of REBCO nanoparticle composite YBCO superconducting layer

A nanoparticle and superconducting layer technology, applied in the direction of nanotechnology, nanotechnology, superconducting devices, etc., can solve the problem that it is difficult to obtain superconducting layers of homogeneous compounds, and achieve size and intrinsic pinning and improve performance, the effect of improving the flux pinning force

Active Publication Date: 2021-03-09
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These studies generally obtain pinning centers of the second phase, and it is difficult to obtain superconducting layers with homogeneous compounds as pinning centers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This embodiment includes the following steps:

[0025] Step 1, adding YBCO particles into the mixed solution for high-speed stirring and stripping to obtain a solution containing YBCO nanoparticles; the mixed solution is prepared from ethanol and propionic acid at a volume ratio of 1:100; the YBCO particles The ratio of the mass to the volume of the mixed solution is 1:100, wherein the unit of mass is g, and the unit of volume is mL; the speed of the high-speed stirring stripping is 30000 rpm, and the time is 2 h;

[0026] Step 2, yttrium trifluoroacetate, barium acetate and copper acetate are dissolved in the solution containing YBCO nanoparticles in step 1 according to the atomic ratio of yttrium: barium: copper=1:2:3, to obtain the YBCO precursor containing YBCO nanoparticles liquid; the total concentration of metal ions in the YBCO precursor solution is 1.5mol / L, and the mass content of YBCO nanoparticles is 5%;

[0027] Step 3, the YBCO precursor solution containi...

Embodiment 2

[0032] This embodiment includes the following steps:

[0033]Step 1, adding GdBCO particles into the mixed solution for high-speed stirring and stripping to obtain a solution containing GdBCO nanoparticles; the mixed solution is prepared from ethanol and propionic acid at a volume ratio of 2.5:100; the GdBCO particles The ratio of the mass to the volume of the mixed solution is 1:100, wherein the unit of mass is g, and the unit of volume is mL; the speed of the high-speed stirring and stripping is 40000rpm, and the time is 1h;

[0034] Step 2, dissolving yttrium trifluoroacetate, barium acetate and copper acetate in the solution containing GdBCO nanoparticles in step 1 according to the atomic ratio of yttrium: barium: copper=1:2:3, to obtain the YBCO precursor containing GdBCO nanoparticles liquid; the total concentration of metal ions in the YBCO precursor liquid is 1.5mol / L, and the mass content of GdBCO nanoparticles is 20%;

[0035] Step 3: Apply the YBCO precursor soluti...

Embodiment 3

[0040] The difference between this example and Example 2 is that in step 1, the mixed solution is prepared from ethanol and propionic acid according to the volume ratio of 5:100, the speed of high-speed stirring and stripping is 35000rpm, and the time is 1.5h; in step 1, GdBCO The mass content of nanoparticles is 15%.

[0041] After testing, the GdBCO nanoparticles in this embodiment are uniformly dispersed and doped into the YBCO superconducting layer, and the resulting superconducting layer has a good c-axis orientation and excellent critical current density.

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PUM

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Abstract

The invention discloses a preparation method of a REBCO nanoparticle composite YBCO superconducting layer. The method comprises the following steps: 1, stirring and stripping REBCO particles at a highspeed to obtain a solution containing REBCO nanoparticles; 2, preparing a YBCO precursor solution containing the REBCO nano particles; 3, coating the substrate with the YBCO precursor solution containing the REBCO nanoparticles to obtain a wet film containing the nanoparticles; 4, performing heat treatment to obtain a pyrolysis film; and 5, carrying out crystallization heat treatment to obtain the REBCO nanoparticle composite YBCO superconducting layer. The solution containing the stably dispersed REBCO nanoparticles is obtained through high-speed stirring stripping under the weak acid condition, it is guaranteed that the proportion of metal ions in the solution is not changed, the metal ions can serve as homogeneous ions of the YBCO precursor solution, the influence on the phase formingreaction of the YBCO superconducting layer is avoided, and then introduction of other second phases in the preparation process is avoided; and the magnetic flux pinning performance of the superconducting layer is improved.

Description

technical field [0001] The invention belongs to the technical field of thin film materials, and in particular relates to a preparation method of a REBCO nano particle composite YBCO superconducting layer. Background technique [0002] The second generation of high temperature superconducting YBCO (YBa 2 Cu 3 o x ) coated conductor has excellent critical current density under high magnetic field in liquid nitrogen temperature zone, and its preparation technology is one of the hotspots in superconductivity research. The way to improve the current-carrying performance of YBCO superconducting thin films is to introduce high-density pinning centers in the superconductor. The pinning centers are classified according to their dimensions, and there are zero-dimensional (oxygen or copper vacancies), one-dimensional (dislocations), two-dimensional (twin boundaries or stacking faults) and three-dimensional (nanoparticles or local strain regions) pinning centers. [0003] The resear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/00B82Y40/00B82Y30/00H01B12/06
CPCC01G3/006B82Y40/00B82Y30/00H01B12/06C01P2004/82C01P2004/20
Inventor 金利华肖晨飞刘国庆冯建情白利锋贾佳林
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH