Superconducting switch with two-sided yttrium barium copper oxide (YBCO) thin film structure
A technology of superconducting switch and thin-film structure, which is applied in the direction of superconducting components, devices that can switch between superconducting and normal conducting states, etc., and can solve the problems of difficult turn-off time and turn-off resistance electrical standards, performance needs to be improved, etc.
Inactive Publication Date: 2013-02-13
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology
[0005] The three critical states of superconducting materials are the main means of controlling switches, including electricity, magnetism, and heat. At present, any single trigger method has its disadvantages. standard
There are still few research reports on the actual operation of high-performance high-temperature superconducting switches, and the performance under high-voltage and high-current conditions needs to be improved.
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[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation.
[0018] figure 1 It is a multilayer structure of a superconducting switch. The main body of the switch is composed of YBCO film material with a double-sided structure. The YBCO superconducting layer is grown on both sides of a two-inch-diameter MgO substrate 4 through a double-inverted target sputtering method. Considering the verticality of the sidewall and the protection of the underlying structure of the film and the substrate during etching, the etching technology of laser-assisted chemical etching is used to divide the superconducting layer into a tortuous path blocked by the etching gap 100; the superconducting layer has several The etched holes 3 are scattered, and the etched holes on the front and back sides are arranged in a staggered manner. This structure was prepared by double-inverted-drum target sputtering. Use the same techno...
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The invention discloses a superconducting switch with a two-sided yttrium barium copper oxide (YBCO) thin film structure. The superconducting switch is operated at a liquid nitrogen temperature zone with electricity, magnetism and an optimized control mode, a switch body is formed by YBCO thin film materials with two-sided structures, a superconducting layer is stopped and divided into winding paths by etching gaps (100), a plurality of dispersed etching empty holes (3) are arranged on the superconducting layer, and the etching empty holes on the front side and the rear side are distributed in staggered mode. The superconducting switch can increase line resistance, improves flexibility of space structure design and integration level of the switch, good heat transfer effect of a MgO base between two superconducting layers has good effect on thermal field balance and critical current density distribution, and uniformity and response speed of disconnection of a switch module are improved greatly.
Description
technical field [0001] The invention belongs to the technical field of superconducting energy conversion, and is a superconducting switch device which uses nonlinear resistance of superconducting materials to realize excitation, closed-loop operation and fast demagnetization of superconducting magnets. Background technique [0002] High-temperature superconducting magnetic energy storage is an efficient energy storage technology. Compared with capacitive energy storage, it has the advantages of high energy storage density, good stability, and small system volume. It has been used in transportation, aerospace, electric power, medicine and other fields. be widely used. The superconducting switch is a key device in the superconducting magnetic energy storage system, which uses the resistance change of the superconducting-normal conducting phase transition to realize the opening and closing of the circuit. The system composed of superconducting switches and superconducting magn...
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Login to View More IPC IPC(8): H01L39/16H01L39/06
Inventor 王豫桂志兴李海涛严仲明王亮刘阳
Owner SOUTHWEST JIAOTONG UNIV