Nb-doped YxYb1-xBCO superconductive film and preparation method thereof

A technology of superconducting thin film, yxyb1-xbco, which is applied in the field of preparation and modification of YBCO coated superconducting thin film to achieve the effect of smooth surface, simple equipment and low cost

Inactive Publication Date: 2013-09-04
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Nb-doped YxYb1-xBCO superconductive film and preparation method thereof
  • Nb-doped YxYb1-xBCO superconductive film and preparation method thereof
  • Nb-doped YxYb1-xBCO superconductive film and preparation method thereof

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Embodiment 1

[0028] 1.3mol.%Nb doped Y 0.25 Yb 0.75 Preparation of BCO precursor solution:

[0029] (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 yttrium acetate and trifluoroacetic acid at a ratio of 1:3. Trifluoroacetic acid, reacted at 60°C for 3 hours, then rotovapped at 60°C to obtain a white powder, which was dissolved in anhydrous methanol, the precursor of Y, Ba.

[0030] (2). Dissolve copper acetate and α-methacrylic acid in anhydrous methanol at a molar ratio of 1:4, reflux at 90°C for more than 3 hours, and then rotary evaporate at 50°C to obtain a blue gel , dissolved in anhydrous methanol to obtain a Cu precursor.

[0031] (3). Filter the precursor solutions of Y, Ba, and Cu separately and mix them to obtain a blue transparent solution. Rotate evaporation at 50°C to obtain a blue gel, which is then diluted with anhydrous methanol to control the total cation concentration to 1.5 ...

Embodiment 2

[0042] 1.5mol.%Nb doped Y 0.25 Yb 0.75 Preparation of BCO precursor solution:

[0043] (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 according to the molar ratio of yttrium acetate and trifluoroacetic acid as 1:3. Trifluoroacetic acid, reacted at 60°C for 3 hours, then rotovapped at 60°C to obtain a white powder, which was dissolved in anhydrous methanol, the precursor of Y, Ba.

[0044] (2). Dissolve copper acetate and α-methacrylic acid in anhydrous methanol at a molar ratio of 1:4, reflux at 90°C for more than 3 hours, and then rotary evaporate at 50°C to obtain a blue gel , dissolved in anhydrous methanol to obtain a Cu precursor.

[0045] (3). Filter the precursor solutions of Y, Ba, and Cu separately and mix them to obtain a blue transparent solution. Rotate evaporation at 50°C to obtain a blue gel, which is then diluted with anhydrous methanol to control the total cation c...

Embodiment 3

[0056] 1.3mol.%Nb doped Y 0.5 Yb 0.5 Preparation of BCO precursor solution:

[0057] (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 yttrium acetate and trifluoroacetic acid at a ratio of 1:3. Trifluoroacetic acid, reacted at 60°C for 3 hours, then rotovapped at 60°C to obtain a white powder, which was dissolved in anhydrous methanol, the precursor of Y,Ba.

[0058] (2). Dissolve copper acetate and α-methacrylic acid in anhydrous methanol at a molar ratio of 1:4, reflux at 90°C for more than 3 hours, and then rotary evaporate at 50°C to obtain a blue gel , dissolved in anhydrous methanol to obtain a Cu precursor.

[0059] (3). Filter the precursor solutions of Y, Ba, and Cu separately and mix them to obtain a blue transparent solution. Rotate evaporation at 50°C to obtain a blue gel, which is then diluted with anhydrous methanol to control the total cation concentration to 1.5 mol...

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Abstract

The invention discloses an Nb-doped YxYb1-xBCO superconductive film and a preparation method thereof, and belongs to the technical field of YBCO superconductive film modification. The method which allows Nb to be doped in a YxYb1-xBCO film comprises the following steps: 1, preparing a YBCO precursor solution; 2, preparing a Yb precursor solution; 3, preparing a YxYb1-xBCO precursor solution; 4, preparing an Nb precursor solution; 5, preparing an Nb-doped YxYb1-xBCO precursor solution; 6, coating a gel film; 7, sintering at a low temperature; and 8, sintering at a high temperature. The method has the advantages of simplicity, easy implementation, discretionary control of the proportion of a dopant, cheap and easily available raw materials, no need of vacuum equipment, and low cost, and the prepared film has a high phase purity, a high critical transition temperature and a good surface.

Description

technical field [0001] The present invention relates to the preparation and modification method of YBCO superconducting thin film, relate in particular to a kind of Nb-doped Y x Yb 1‐x The invention relates to a BCO superconducting thin film and a preparation method thereof, which belong to the field of preparation and modification of a YBCO coating superconducting thin film. technical background [0002] Energy-saving, high-efficiency technical features and wide application potential make high-temperature superconducting technology particularly viable under the background of emphasizing high-efficiency energy-saving and environmental protection. Superconducting materials and their applications are considered to be high-tech with strategic significance in the 21st century. At present, superconducting application technology is developing in the direction of practical application, and will be one of the most important research fields in the development of science and technolo...

Claims

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Application Information

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IPC IPC(8): C04B35/45C04B35/624
Inventor 索红莉毛磊刘敏任程张子立徐燕马麟
Owner BEIJING UNIV OF TECH
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