Apparatus and method for dynamic deposition of second-generation high-temperature superconducting tape
A high-temperature superconducting tape, dynamic deposition technology, applied in the use of superconducting elements, equipment for manufacturing conductive/semiconducting layers, cable/conductor manufacturing, etc., can solve the problem of limited sample size, complex preparation process, and preparation system Difficulties and other problems, to achieve the effect of smooth surface and good electrical performance
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[0050] In the present invention, yttrium acetate, barium acetate and copper acetate are used as raw materials to prepare the precursor liquid, and the precursor liquid is placed in the precursor liquid tank 3 . In the present invention, the molar ratio of the yttrium acetate, barium acetate and copper acetate is 1:2:3; the solvent of the precursor solution is preferably methanol; the three metal elements of yttrium, barium and copper in the precursor solution are The total ion concentration is preferably 1.5-4.5 mol / L, more preferably 3-4.5 mol / L, and the thickness of the precursor on the metal base tape can be controlled by adjusting the concentration of the precursor liquid. In the present invention, the preparation method of the precursor liquid preferably comprises the following steps:
[0051] Yttrium acetate, barium acetate and copper acetate are mixed and dissolved in an aqueous solution of trifluoroacetic acid to obtain a first mixed solution;
[0052] The first mixed...
Embodiment 1
[0063] An apparatus for dynamically depositing second-generation high-temperature superconducting tapes, such as figure 1 shown, including dynamic winding system and vacuum heat treatment furnace;
[0064] The dynamic winding system includes an unwinding device 1, a winding skeleton 2 and a precursor liquid tank 3 located below the unwinding device 1 and the winding skeleton 2; the unwinding device 1 and the winding skeleton 2 are respectively connected with a servo motor 6-1 and servo motor 6-2; the unwinding device 1 is provided with a tension control system 4, the winding skeleton 2 is provided with a linear speed detection device 5, and the tension control system 4 and the linear speed detection device 5 are connected by a data line;
[0065] The vacuum heat treatment furnace includes a vacuum furnace chamber 7 and a rotating device 14; the outer wall of the vacuum furnace chamber 7 is provided with a temperature-controlling thermocouple 8, an air inlet 9, an air suction p...
Embodiment 2
[0073] A device for dynamically depositing second-generation high-temperature superconducting tapes, the same as in Example 1, uses the device to dynamically deposit second-generation high-temperature superconducting tapes, and the method is as follows:
[0074] (1) Configure the precursor solution: weigh yttrium acetate, barium acetate and copper acetate according to the molar ratio of 1:2:3, mix the yttrium acetate, barium acetate and copper acetate and dissolve them in deionized water containing 10 mol% trifluoroacetic acid ( The molar ratio of trifluoroacetic acid and barium acetate is 2.5:1) to prepare a solution; after stirring the obtained solution with a magnetic stirrer for 1 h, use a rotary evaporator to evaporate the solvent to obtain a crude gel; add methanol to the prepared crude gel In the gel, stir with a magnetic stirrer for 0.5 h, and then use a rotary evaporator to evaporate the solvent to obtain a purified gel; finally, methanol is added to the purified gel t...
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Abstract
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