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Device and method for dynamically depositing 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. It is difficult to replace high-temperature superconducting tapes and other problems, and achieves the effect of good electrical properties and smooth surface.

Active Publication Date: 2021-07-16
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the very complicated preparation process, it is very difficult to prepare the second-generation high-temperature superconducting tape, especially the development of a meter-level preparation system is very difficult. At present, it is mainly through pulsed laser deposition (PLD) and metal-organic chemical vapor deposition (MOCVD). and multiple co-evaporation devices to process static single crystal substrates to prepare YBCO strips, the sample size is limited

Method used

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  • Device and method for dynamically depositing second-generation high-temperature superconducting tape
  • Device and method for dynamically depositing second-generation high-temperature superconducting tape
  • Device and method for dynamically depositing second-generation high-temperature superconducting tape

Examples

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preparation example Construction

[0050] The present invention uses yttrium acetate, barium acetate and copper acetate as raw materials to prepare a precursor solution, and puts the precursor solution in the precursor solution tank 3 . In the present invention, the molar ratio of 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 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 substrate can be controlled by adjusting the concentration of the precursor solution. In the present invention, the preparation method of the precursor solution preferably includes the following steps:

[0051] mixing yttrium acetate, barium acetate and copper acetate, and dissolving them in an aqueous solution of trifluoroacetic acid to obtain a first mixed solution;

[0052] The first mixed solution ...

Embodiment 1

[0063] A device for dynamically depositing second-generation high-temperature superconducting tapes, such as figure 1 As shown, including dynamic winding system and vacuum heat treatment furnace;

[0064] The dynamic winding system includes an unwinding device 1, a winding frame 2, and a precursor liquid tank 3 located below the unwinding device 1 and the winding frame 2; the unwinding device 1 and the winding frame 2 are respectively connected to servo motors 6-1 and a servo motor 6-2; the unwinding device 1 is provided with a tension control system 4, the winding skeleton 2 is provided with a line speed detection device 5, and the tension control system 4 and the line speed detection device 5 are connected by a data line;

[0065] The vacuum heat treatment furnace includes a vacuum furnace cavity 7 and a rotating device 14; the outer wall of the vacuum furnace cavity 7 is provided with a temperature control thermocouple 8, an air inlet 9, an air extraction port 10, a cooling...

Embodiment 2

[0073] A device for dynamically depositing a second-generation high-temperature superconducting tape, which is the same as in Example 1, using the device to dynamically deposit a second-generation high-temperature superconducting tape, 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 10mol% trifluoroacetic acid ( The molar ratio of trifluoroacetic acid to barium acetate is 2.5:1) to form a solution; after stirring the prepared solution for 1 h with a magnetic stirrer, the solvent was evaporated by a rotary evaporator to obtain a coarse gel; methanol was added to the obtained crude gel In the gel, after being stirred by a magnetic stirrer for 0.5h, the solvent was evaporated by a rotary evaporator to obtain a purified gel; finally, methanol was added to th...

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Abstract

The invention provides a device and method for dynamically depositing a second-generation high-temperature superconducting tape, and belongs to the technical field of coating process equipment. The device provided by the invention comprises a dynamic winding system and a vacuum heat treatment furnace; the dynamic winding system comprises an unwinding device, a winding framework and a precursor liquid tank; the unwinding device and the winding framework are connected with servo motors; the vacuum heat treatment furnace comprises a vacuum furnace chamber and a rotating device; a temperature control thermocouple, an air inlet, an extraction opening, a cooling water inlet and a cooling water outlet are arranged on the outer wall of the vacuum furnace chamber, and a heating coil is arranged on the inner wall of the vacuum furnace chamber; and a central shaft of the rotating device penetrates through the center of the vacuum furnace chamber. When the device provided by the invention is used for dynamically depositing the second-generation high-temperature superconducting tape, the hectometer-level second-generation high-temperature superconducting tape can be prepared through continuous dip-coating and high-temperature heat treatment by a chemical solution method, and the obtained second-generation high-temperature superconducting tape is smooth and compact in surface and good in electrical property.

Description

technical field [0001] The invention relates to the technical field of coating process equipment, in particular to a device and method for dynamically depositing second-generation high-temperature superconducting strips. Background technique [0002] In 1911, Dutch scientist Onnes discovered that when the temperature dropped below 4.15K, the resistance of metallic mercury (Hg) dropped sharply to near zero. Onnes named it a superconducting state, and since then opened the door to research in the field of superconductivity. In practical applications, the critical transition temperature (T c ), the critical magnetic field (H c ) and critical current density (J c ) need to be lower than the applied temperature, ambient magnetic field and carrying current density at the same time to maintain the superconducting state. Based on this requirement, although thousands of superconductors have been discovered so far, only five of them can be put into practical use: NbTi, Nb 3 Sn, Mg...

Claims

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Application Information

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IPC IPC(8): H01B13/00
CPCH01B13/0026Y02E40/60
Inventor 丁发柱古宏伟黄大兴商红静李太广高召顺谢波玮邹琪
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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