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
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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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