Second-phase nanoparticle doped YBCO (yttrium barium copper oxide) film and preparation method thereof

A nanoparticle and film technology, which is applied in the field of second-phase nanoparticle-doped YBCO film and its preparation, can solve the problem that the second equality cannot be guaranteed, and achieve the effects of improved Jc performance, low cost, and simple and easy preparation method

Active Publication Date: 2011-08-03
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the current preparation process, all metal-organic compounds are dissolved in the solvent in the form of monomers. This large mixing cannot guarantee the formation of an ideal second phase, and at the same time, non-ideal heterogeneous phases are prone to appear.

Method used

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  • Second-phase nanoparticle doped YBCO (yttrium barium copper oxide) film and preparation method thereof
  • Second-phase nanoparticle doped YBCO (yttrium barium copper oxide) film and preparation method thereof
  • Second-phase nanoparticle doped YBCO (yttrium barium copper oxide) film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of the second phase nanoparticle-doped YBCO precursor:

[0028] a. Dissolve yttrium trifluoroacetate, barium trifluoroacetate and copper trifluoroacetate in methanol according to the atomic ratio of Y: Ba: Cu = 1: 2: 3, then carry out vacuum distillation to remove impurity water, and determine the solution with methanol Obtain the YBCO precursor solution; The total concentration of yttrium, barium and copper metal ions in the YBCO precursor solution is 1mol / L;

[0029] b. The aqueous solution of soluble salt is added in the microemulsion phase, forms the water-in-oil soluble salt microemulsion system by the mode of magnetic stirring or ultrasonic dispersion; Described soluble salt is barium nitrate and zirconium nitrate by Ba:Zr=1: The atomic ratio of 1 is mixed, and the total concentration of metal ions in the aqueous solution of soluble salt is 0.1mol / L; the microemulsion phase is formed by mixing alkane, alcohol and surfactant in a volume ratio of 15:...

Embodiment 2

[0040] The preparation method of this embodiment is the same as that of Example 1, except that the soluble salt is mixed with barium nitrate and hafnium nitrate according to the atomic ratio of Ba:Hf=1:1, or barium nitrate, copper nitrate and nitrate Yttrium is mixed according to the atomic ratio of Ba: Cu: Y=1:1:2; the alkane is n-heptane, the alcohol is isoamyl alcohol; the precipitating agent is sodium hydroxide; the second phase nanoparticles for BaHfO 3 or Y 2 BaCuO 5 .

[0041] In this example, by precisely controlling the separate phase formation of the second-phase particles, and at the same time promoting the uniform dispersion of the second phase in the superconducting phase matrix, the second-phase nanoparticle-doped YBCO film prepared compared with the pure YBCO film has a better performance under 77K zero field Jc exceeds 3MA / cm 2 , the Jc performance is significantly improved under the magnetic field.

Embodiment 3

[0043] (1) Preparation of the second phase nanoparticle-doped YBCO precursor:

[0044] a. Dissolve yttrium trifluoroacetate, barium trifluoroacetate and copper trifluoroacetate in methanol according to the atomic ratio of Y: Ba: Cu = 1: 2: 3, then carry out vacuum distillation to remove impurity water, and determine the solution with methanol Obtain the YBCO precursor solution; The total concentration of yttrium, barium and copper metal ions in the YBCO precursor solution is 1.5mol / L;

[0045] b. the aqueous solution of soluble salt is added in the microemulsion phase, forms the water-in-oil soluble salt microemulsion system by the mode of magnetic stirring or ultrasonic dispersion; Described soluble salt is barium nitrate and hafnium nitrate by Ba:Hf=1: The atomic ratio of 1 is mixed; the total concentration of metal ions in the aqueous solution of the soluble salt is 0.5mol / L; the microemulsion phase is mixed by alkane, alcohol and surfactant in a volume ratio of 10:3:1; the...

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Abstract

The invention discloses a second-phase nanoparticle doped YBCO (yttrium barium copper oxide) film and a preparation method thereof. The film is composed of the following compositions in percentage by mass: 0.1-5% of second-phase nanoparticles and the balance of YBCO, wherein the second-phase nanoparticle is BaZrO3, BaHfO3 or Y2BaCuO5. The method for preparing the film comprises the following steps: 1, preparing a second-phase nanoparticle doped YBCO precursor solution; 2, uniformly coating the second-phase nanoparticle doped YBCO precursor solution on a lanthanum aluminate single crystal substrate; 3, carrying out low temperature pyrolysis on the obtained product; 4, carrying out high temperature crystallization and oxygen diffusion processing on the object obtained in the step 3 so as to obtain the second-phase nanoparticle doped YBCO film. The preparation method disclosed by the invention is easy to operate, simple in experimental facility, low in cost, and capability of satisfying the requirements of industrial production. Compared with a pure YBCO film, the Jc performance of the prepared second-phase nanoparticle doped YBCO film is obviously improved under a magnetic field.

Description

technical field [0001] The invention belongs to the technical field of high-temperature superconducting materials, and in particular relates to a second-phase nanoparticle-doped YBCO thin film and a preparation method thereof. Background technique [0002] Coated conductors have become one of the hotspots in the research of practical high-temperature superconducting materials due to their superior high-field performance at 77K. In thin films, artificially introducing second phases or defect structures is an important means to improve the magnetic flux pinning properties of coated conductors. In the physical process route, especially in PLD, the in-situ introduction of the second phase or defect structure can be realized directly by adding the second component in the target or changing the nominal composition of the target. The Oak Ridge National Laboratory of the United States adopted a PLD-YBCO+BZO mixed sintered target, which improved the performance of the coated conduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B12/00H01B13/00
CPCY02E40/64Y02E40/60
Inventor 金利华卢亚锋于泽铭李成山
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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