ZrO2 nanometer points of single material, and preparation method and application thereof

A technology of nano-dots and single crystal substrates, which is applied in nanotechnology, metal material coating technology, solid-state chemical plating, etc., to achieve the effect of single material and simple technology

Inactive Publication Date: 2012-12-26
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems existing in the preparation process of the existing coating conductor transition layer, and provide a simple and efficient preparation method that can effectively control the shape, number and distribution of the introduced nano-dots before YBCO deposition

Method used

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  • ZrO2 nanometer points of single material, and preparation method and application thereof
  • ZrO2 nanometer points of single material, and preparation method and application thereof
  • ZrO2 nanometer points of single material, and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0029] 1) Dissolving zirconium acetylacetonate into n-propionic acid to prepare a 0.001mol / L precursor solution;

[0030] 2) Apply the precursor solution to the (100) SrTiO by spin coating 3 On the single crystal substrate, the rotation speed is 2500rpm, and the time is 120s to obtain the precursor film;

[0031] 3) in H 2 Under gas protection conditions, the precursor film was sintered at 1000 °C for 1000 minutes to obtain ZrO 2 nano dots.

[0032] 4) The YBCO film was prepared by the low-fluorine MOD process on the transition layer substrate coated with nanodots.

[0033] ZrO 2 The surface topography of figure 1 As shown, the AFM-2D photo shows that the nanodots are completely dispersed, with a density of 80 / μm, an average height of 5 nanometers, and an average diameter of 100 nanometers.

Embodiment 2

[0035] 1) Dissolving zirconium acetylacetonate into n-propionic acid to prepare a 0.03mol / L precursor solution;

[0036] 2) Apply the precursor solution to the SrTiO at 20 degrees to the (100) direction by spin coating 3 On the single crystal substrate, the rotation speed is 5000rpm, and the time is 40s to obtain the precursor film;

[0037] 3) in H 2 Under gas protection conditions, the precursor film was sintered at 1300 °C for 100 minutes to obtain ZrO 2 nano dots.

[0038] 4) The YBCO film was prepared by the low-fluorine MOD process on the transition layer substrate coated with nanodots.

[0039] ZrO 2 The three-dimensional surface morphology of figure 2 As shown, the morphology of the nanodots in this AFM-3D photo is regular. The density is 10 / μm; the height is 14nm; the diameter is 200nm.

Embodiment 3

[0041] 1) Dissolving zirconium acetylacetonate into n-propionic acid to prepare a 0.005mol / L precursor solution;

[0042] 2) Apply the precursor solution to the LaAlO with a deviation of 10 degrees from the (100) direction by spin coating 3 On the single crystal substrate, the rotation speed is 4000rpm, and the time is 60s to obtain the precursor film;

[0043] 3) in H 2 Mixing with Ar (H 2 The volume percentages of Ar and Ar are 4% and 96%, respectively) under gas protection conditions, the precursor film was sintered at 1150 ° C for 300 minutes to obtain ZrO 2 nano dots.

[0044] 4) The YBCO film was prepared by the low-fluorine MOD process on the transition layer substrate coated with nanodots.

[0045] image 3 ZrO 2 J after normalization of +YBCO and blank YBCO e picture; Figure 4 ZrO 2 +YBCO normalized J e value (J e / J e (sf)) and the logarithm of the external magnetic field (77K), that is, the α curve. image 3 the J e The curve shows that ZrO 2 +YBCOJ ...

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Abstract

The invention discloses ZrO2 nanometer points of a single material, and a preparation method and application thereof, and belongs to the technical field of the preparation of high-temperature superconducting materials. The method comprises the following steps of: 1) dissolving zirconium acetylacetonate in propionic acid to obtain precursor liquid; 2) coating the precursor liquid, namely coating the precursor liquid obtained in the step 1) on a monocrystal substrate in a spin coating mode to obtain a precursor membrane; and 3) sintering at a high temperature, namely sintering the precursor membrane at the temperature of between 1,000 and 1,300 DEG C under the condition of introducing protective gas for 100 to 1,000 minutes to obtain the discontinuous ZrO2 nanometer points of which the height is between 5 and 50 nanometers, the diameter is between 30 and 200 nanometers and the granular density is between 10 and 80 pieces / micrometer. A yttrium barium copper oxide (YBCO) membrane is prepared by a low-fluorine metallorganic deposition (MOD) process on the substrate, so that YBCO has certain defects due to poor matching on crystal lattices during nucleation near island granules, and the defects are used as pinning centers to improve the superconducting performance of the YBCD membrane under the condition of an additional magnetic field.

Description

technical field [0001] The invention belongs to the technical field of preparation of high-temperature superconducting materials, and relates to a preparation technology for surface modification of a transition layer of a high-temperature superconducting coating conductor, in particular to a single material ZrO 2 Nanodots, preparation methods and applications. Background technique [0002] The second-generation coated superconductor of rare earth barium copper oxide mainly based on YBCO, due to its high irreversible field, high current carrying capacity, low AC loss, and potential price advantage, was recognized as early as the end of the 1980s. The prediction will have a very broad application prospect. However, superconducting materials are mostly used in the environment of an external magnetic field, and their engineering critical current density (J e ) decreases sharply with the increase of the external magnetic field. where the magnetic field and J e There is a cert...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G25/02B82Y40/00C23C20/08
Inventor 刘敏徐燕叶帅吴紫平吕昭程艳玲马麟邱火勤董传博索红莉
Owner BEIJING UNIV OF TECH
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