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High-performance REBCO multilayer film, application and preparation method for high-performance REBCO multilayer film

A multi-layer, high-performance technology, applied in coatings, metal material coating processes, ion implantation plating, etc., can solve problems such as affecting film performance and current inability to conduct, and achieve high critical current density, high shape The effect of morphology stability and repeatability, and simple preparation method

Active Publication Date: 2016-06-08
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Studies at home and abroad have shown that introducing pinning centers into superconducting thin films by preparing sandwich structures can significantly solve the problem that the Jc of superconducting films decreases rapidly with thickness and magnetic field, but the thickness of the intermediate layer needs to be controlled at the nanometer level Even for the nano-dummy layer, if the thickness of the middle layer is large, the current between the adjacent REBCO layers cannot be conducted, which will affect the performance of the film.

Method used

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  • High-performance REBCO multilayer film, application and preparation method for high-performance REBCO multilayer film

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Embodiment 1

[0054] This embodiment provides a method for preparing a REBCO multilayer film on an IBAD-MgO substrate, comprising the following steps:

[0055] Step 1. Install the REBCO and STO targets prepared by high-temperature sintering into the target holder in the cavity;

[0056] Step 2, winding the IBAD-MgO base tape coated with an isolation layer in a multi-channel pulsed laser deposition system;

[0057] Step 3. Close the door of the coating system and evacuate to the required vacuum degree of 1×10 -7 , and then start the heater to raise the temperature to the temperature value required by the REBCO thin film process, the temperature is 750°C;

[0058] Step 4, feed oxygen, adjust the air pressure of the gas to the air pressure value required by the REBCO thin film coating process, and the air pressure is 200mTorr;

[0059] Step 5. Start the laser target rotation and scanning system, start the energy and frequency of the excimer laser to the value required by the REBCO thin film ...

Embodiment 2

[0074] This embodiment provides a method for preparing a REBCO multilayer film on an IBAD-MgO substrate, comprising the following steps:

[0075] Step 1. Install the REBCO and STO targets prepared by high-temperature sintering into the target holder in the cavity;

[0076] Step 2, winding the IBAD-MgO base tape coated with an isolation layer in a multi-channel pulsed laser deposition system;

[0077] Step 3. Close the door of the coating system and evacuate to the required vacuum degree of 1×10 -6 , and then start the heater to raise the temperature to the temperature value required by the REBCO thin film process, the temperature is 800°C;

[0078] Step 4, feed oxygen, adjust the air pressure of the gas to the air pressure value required by the REBCO thin film coating process, and the air pressure is 300mTorr;

[0079] Step 5. Start the laser target rotation and scanning system, start the energy and frequency of the excimer laser to the value required by the REBCO thin film ...

Embodiment 3

[0094] This embodiment provides a method for preparing a REBCO multilayer film on an IBAD-MgO substrate, comprising the following steps:

[0095] Step 1. Install the REBCO and STO targets prepared by high-temperature sintering into the target holder in the cavity;

[0096] Step 2, winding the IBAD-MgO base tape coated with an isolation layer in a multi-channel pulsed laser deposition system;

[0097] Step 3. Close the door of the coating system and evacuate to the required vacuum degree of 1×10 -5 , and then start the heater to raise the temperature to the temperature value required by the REBCO thin film process, the temperature is 800°C;

[0098] Step 4, feed oxygen, adjust the air pressure of the gas to the air pressure value required by the REBCO thin film coating process, and the air pressure is 400mTorr;

[0099] Step 5. Start the laser target rotation and scanning system, start the energy and frequency of the excimer laser to the value required by the REBCO thin film ...

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Abstract

The invention relates to the technical field of yttrium barium copper oxide coating conductors, in particular to a high-performance REBCO multilayer film, application and a preparation method for the high-performance REBCO multilayer film. The high-performance REBCO multilayer film is composed of a REBCO thin film layer and an STO interlayer. The invention further relates to the application of the high-performance REBCO multilayer film during preparing of a high-temperature superconductive belt material and relates to the preparation method for the high-performance REBCO multilayer film. The preparation method comprises the following steps that an IBAD-MgO base belt plated with an isolated layer is taken, and the high-performance REBCO multilayer film is prepared through a multi-target multi-channel pulse laser method. The prepared high-performance REBCO multilayer film prepared has a pure C-axis orientation, a smooth compact surface and a high critical current density, and the critical current density reaches up to 5 MA / cm<2>. The REBCO multilayer film has high critical current under a self field or a magnetic field, has the high binding force, can meet the application requirements for a superconducting cable and the like and is suitable for industrialization production.

Description

technical field [0001] The invention belongs to the technical field of yttrium-barium-copper-oxide-coated conductors, and specifically relates to a high-performance REBCO multilayer film, its application and its preparation method. Background technique [0002] As the second generation of high-temperature superconducting tape, REBCO coated conductor has the characteristics of high critical current density (Jc), magnetic field (Jc-B) characteristics and low price, and it is likely to replace bismuth-based high-temperature superconducting tape in the future. In the field of superconducting strong electric technology, such as motors, motors, transformers, current limiters, magnets, superconducting energy storage, nuclear magnetic resonance imaging, etc. Devices and equipment such as superconducting cables, superconducting transformers and superconducting current limiters made of superconducting tapes have the advantages of small size, light weight, high efficiency and low energ...

Claims

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Application Information

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IPC IPC(8): C23C14/08C23C14/28
CPCC23C14/08C23C14/28
Inventor 刘林飞李贻杰王斌斌姚艳婕吴祥王梦麟
Owner SHANGHAI JIAO TONG UNIV
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