Method for preparing YBCO (Yttrium Barium Copper Oxide) film through nanoparticle induced epitaxial growth

A nanoparticle and epitaxial growth technology, which is applied in the direction of cable/conductor manufacturing, chemical instruments and methods, rare earth metal compounds, etc., can solve the problem of not improving the magnetic flux pinning ability of the superconducting layer in an all-round way, limiting the growth of the superconducting layer, and not having Promote the epitaxial growth of the superconducting layer and other issues, achieve excellent critical current density, promote c-axis orientation growth and form defects, and improve the effect of magnetic flux pinning performance

Active Publication Date: 2017-12-12
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the introduced nanoparticles generally limit the growth of the superconducting layer, and do not promote the epitaxial growth of the superconducting layer. A three-dimensional defect structure has not been formed in the superconducting matrix, and it has not comprehensively improved the magnetic properties of the superconducting layer. Through pinning ability

Method used

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  • Method for preparing YBCO (Yttrium Barium Copper Oxide) film through nanoparticle induced epitaxial growth
  • Method for preparing YBCO (Yttrium Barium Copper Oxide) film through nanoparticle induced epitaxial growth
  • Method for preparing YBCO (Yttrium Barium Copper Oxide) film through nanoparticle induced epitaxial growth

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Experimental program
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Embodiment 1

[0034] The method of this embodiment is:

[0035] Step 1. Add holmium nitrate and cerium nitrate into the mixed solvent according to the atomic ratio of Ho:Ce=0.1:0.9, stir evenly to obtain a precursor solution with a total cation concentration of 50mmol / L, and then place the precursor solution in the reaction The solvothermal reaction was carried out in the kettle, and after the reaction was completed, it was left to stand and divided into an aqueous phase and an organic phase, and the prepared cubic Ho 0.1 Ce 0.9 o 1.95 Nanoparticles exist in the organic phase, after removing the aqueous phase, the 0.1 Ce 0.9 o 1.95 The organic phase of the nanoparticles was concentrated by centrifugation, and then transferred to the centrifuged concentrated Ho 0.1 Ce 0.9 o 1.95 Add ethanol to the organic phase of nanoparticles, and obtain Ho 0.1 Ce 0.9 o 1.95 A dispersion of nanoparticles; the Ho 0.1 Ce 0.9 o 1.95 The concentration of total cations in the nanoparticle dispersio...

Embodiment 2

[0041] The method of this embodiment is:

[0042] Step 1. Add holmium nitrate and cerium nitrate into the mixed solvent according to the atomic ratio of Ho: Ce=0.25:0.75, stir evenly to obtain a precursor solution with a total cation concentration of 100mmol / L, and then place the precursor solution in the reaction The solvothermal reaction was carried out in the kettle, and after the reaction was completed, it was left to stand and divided into an aqueous phase and an organic phase, and the prepared cubic Ho 0.25 Ce 0.75 o 1.88 Nanoparticles exist in the organic phase, after removing the aqueous phase, the 0.25 Ce 0.75 o 1.88 The organic phase of the nanoparticles was concentrated by centrifugation, and then transferred to the centrifuged concentrated Ho 0.25 Ce 0.75 o 1.88 Add ethanol to the organic phase of nanoparticles, and obtain Ho 0.25 Ce 0.75 o 1.88 A dispersion of nanoparticles; the Ho 0.25 Ce 0.75 o 1.88 The concentration of total cations in the nanopartic...

Embodiment 3

[0048] The method of this embodiment is:

[0049] Step 1. Add holmium nitrate and cerium nitrate into the mixed solvent according to the atomic ratio of Ho: Ce=0.5:0.5, stir evenly to obtain a precursor solution with a total cation concentration of 5 mmol / L, and then place the precursor solution in the reaction The solvothermal reaction was carried out in the kettle, and after the reaction was completed, it was left to stand and divided into an aqueous phase and an organic phase, and the prepared cubic Ho 0.5 Ce 0.5 o 1.75 Nanoparticles exist in the organic phase, after removing the aqueous phase, the 0.5 Ce 0.5 o 1.75 The organic phase of the nanoparticles was concentrated by centrifugation, and then transferred to the centrifuged concentrated Ho 0.5 Ce 0.5 o 1.75 Add ethanol to the organic phase of nanoparticles, and obtain Ho 0.5 Ce 0.5 o 1.75 A dispersion of nanoparticles; the Ho 0.5 Ce 0.5 o 1.75 The concentration of total cations in the nanoparticle dispersi...

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Abstract

The invention discloses a method for preparing a YBCO (Yttrium Barium Copper Oxide) film through nanoparticle induced epitaxial growth. The method comprises the following steps: 1, preparing dispersion of HoxCe1-xO2-delta nanoparticles or dispersion of DyxCe1-xO2-delta nanoparticles; 2, coating the dispersion of HoxCe1-xO2-delta nanoparticles or the dispersion of DyxCe1-xO2-delta nanoparticles onto a substrate, and drying to obtain the substrate modified with the nanoparticles on the surface; 3, adding the dispersion of HoxCe1-xO2-delta nanoparticles or the dispersion of DyxCe1-xO2-delta nanoparticles into a YBCO precursor solution, uniformly stirring, spin-coating on the substrate modified with the nanoparticles on the surface, placing in a quartz tube furnace, crystallizing under argon-oxygen mixed gases, performing oxygen-permeation treatment in an oxygen atmosphere, performing furnace cooling, thereby obtaining the nanoparticle-induced orientation-enhanced YBCO film. According to the method disclosed by the invention, cubic nanoparticles with c-axis orientation advantages are prepared, and the nanoparticles are modified on the substrate surface through a self-assembly behavior so as to induce epitaxial orientation growth of a superconductive layer. Meanwhile, the cubic nanoparticles are introduced into the superconductive layer, so that the flux pinning performance of the superconductive layer is fully improved.

Description

technical field [0001] The invention belongs to the technical field of high-temperature superconducting materials, and in particular relates to a method for preparing YBCO thin films by inducing epitaxial growth of nanoparticles. Background technique [0002] The YBCO coated conductor is a quasi-single crystal oxide grown based on a biaxially textured buffer layer template, and is a key material for high-temperature superconducting materials to achieve high-field applications in the liquid nitrogen temperature region. Researchers generally solve the weak connection problem of the superconducting layer by textured templates, and improve the critical current density-magnetic field characteristics by introducing effective flux pinning centers, which is the fundamental way to advance high-temperature superconducting materials to the commercial application stage. [0003] Researchers have introduced a variety of pinning compounds, such as single-phase, mixed multi-phase, point su...

Claims

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Application Information

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IPC IPC(8): C01F17/00H01B13/00
CPCC01F17/32C01P2002/72C01P2004/03C01P2004/04C01P2006/40C01P2006/42H01B13/00
Inventor金利华冯建情王耀李成山刘国庆贾佳林张平祥
OwnerNORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH