V-doped YBCO (Yttrium Barium Copper Oxide) superconducting thin film and preparation method thereof

A technology of superconducting thin film and precursor liquid, applied in manufacturing tools, ceramic molding machines, etc., can solve the problems of high cost, complex equipment, high vacuum, etc., and achieve the effect of high critical transition temperature, low cost, and smooth surface

Inactive Publication Date: 2013-08-28
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, methods such as PLD and magnetron sputtering are mainly used to achieve the doping of YBCO. Although these methods have obvious doping effects, the equipment is complicated, high vacuum is required, the cost is expensive, and it is not easy to flexibly control the doping amount. These are unfavorable for large-scale industrialization

Method used

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Experimental program
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Effect test

Embodiment 1

[0025] 1. Preparation of V-doped YBCO precursor:

[0026] (1) Dissolve yttrium acetate and barium acetate in deionized water at a molar ratio of 1:2. After fully stirring and dissolving at 50°C, add three Fluoroacetic acid, after reacting at 50°C for 3 hours, was rotovapped at 50°C to obtain a white powder, which was dissolved in anhydrous methanol, the precursor of Y and Ba.

[0027] (2) Dissolve copper acetate and α-methacrylic acid in anhydrous methanol at a molar ratio of 1:4, reflux at 80°C for more than 3 hours, and then rotary evaporate at 50°C to obtain a blue gel, Dissolved with anhydrous methanol to obtain Cu precursor.

[0028] (3) Filter the precursor solutions of Y, Ba, and Cu respectively and mix them to obtain a blue transparent solution. Rotate evaporation at 50°C to obtain a blue gel, and then dilute with anhydrous methanol to control the total cation concentration to 2.0mol / L, is the YBCO precursor.

[0029] (4) Add vanadium acetylacetonate (C 15 h 21 o...

Embodiment 2

[0034] 1. Preparation of V-doped YBCO precursor:

[0035] (1) Dissolve yttrium acetate and barium acetate in deionized water at a molar ratio of 1:2. After fully stirring and dissolving at 55°C, add three Fluoroacetic acid, after reacting at 55°C for 3 hours, was rotovapped at 50°C to obtain a white powder, which was dissolved in anhydrous methanol, the precursor of Y and Ba.

[0036] (2) Dissolve copper acetate and α-methacrylic acid in anhydrous methanol at a molar ratio of 1:4, reflux at 80°C for more than 3 hours, and then rotary evaporate at 50°C to obtain a blue gel, Dissolved with anhydrous methanol to obtain Cu precursor.

[0037](3) Filter the precursor solutions of Y, Ba, and Cu respectively and mix them to obtain a blue transparent solution. Rotate evaporation at 50°C to obtain a blue gel, and then dilute with anhydrous methanol to control the total cation concentration to 2.5mol / L, is the YBCO precursor.

[0038] (4) Add vanadium acetylacetonate (C 15 h 21 o ...

Embodiment 3

[0043] 1. Preparation of V-doped YBCO precursor:

[0044] (1) Dissolve yttrium acetate and barium acetate in deionized water at a molar ratio of 1:2. After fully stirring and dissolving at 60°C, add three Fluoroacetic acid, reacted at 60°C for 3 hours, then evaporated at 55°C to obtain a white powder, which was dissolved in anhydrous methanol, the precursor of Y, Ba.

[0045] (2) Dissolve copper acetate and α-methacrylic acid in anhydrous methanol at a molar ratio of 1:4, reflux at 80°C for more than 3 hours, and then rotary evaporate at 55°C to obtain a blue gel, Dissolved with anhydrous methanol to obtain Cu precursor.

[0046] (3) Filter the precursors of Y, Ba, and Cu separately and mix them to obtain a blue transparent solution. Rotate evaporation at 55°C to obtain a blue gel, which is then diluted with anhydrous methanol to control the total cation concentration to 3mol / L is the YBCO precursor.

[0047] (4) Add vanadium acetylacetonate (C 15 h 21 o 6 V), the added...

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Abstract

The invention relates to a V-doped YBCO (Yttrium Barium Copper Oxide) superconducting thin film and a preparation method thereof, and belongs to the technical field of preparation of YBCO coating superconducting thin films. The preparation method of a double perovskite structure nanoparticle BYVO-doped YBCO superconducting thin film comprises the following steps: 1) first, preparing a precursor liquor, and mixing yttrium acetate, barium acetate and copper acetate at a molar ratio of 1:2:3 to prepare a YBCO precursor liquor; 2) uniformly stirring and then vanadium acetylacetonate, wherein the molar concentration of three metal total ions to prepare the V-doped YBCO precursor liquor; 3) coating a gel thin film; 4) sintering at low temperature; and 5) sintering at high temperature to form the nano BYVO containing YBCO superconducting thin film. The method provided by the invention is simple and accessible, and the proportion of adulterants can be arbitrarily controlled. The thin film prepared has the advantages of higher critical transformation temperature and critical current density and a good biaxial texture.

Description

technical field [0001] The invention relates to a YBCO high-temperature superconducting thin film material and a preparation method thereof, and belongs to the technical field of YBCO coated superconducting thin film preparation. Background technique [0002] YBCO coated superconducting material, due to its own series of advantages, has attracted widespread attention in the world once it is discovered, and is considered to be the superconducting material most likely to be applied on a large scale. With the deepening of research, the application of YBCO superconducting materials is also approaching. However, YBCO has a disadvantage, that is, with the increase of the external magnetic field, the critical current density it carries decreases significantly. However, most of the applications of YBCO superconducting materials are under the external magnetic field, so it is really necessary to achieve practical application. It is required to have a high current-carrying capacity u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/45C04B35/622B28B1/30
Inventor 索红莉任程毛磊刘敏徐燕张子立
Owner BEIJING UNIV OF TECH
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