Ultrasound spray pyrolysis preparation method of MgO buffer layer for coating conductor

A technology of ultrasonic spray pyrolysis and coated conductors, which is applied in the usage of superconductor elements, cable/conductor manufacturing, coating, etc. It can solve the problems of unfavorable large-scale industrial production and the need for vacuum systems, etc., and achieves fast film formation, The effect of simplifying equipment and reducing production cost

Inactive Publication Date: 2014-10-29
NANJING UNIVERSTIY SUZHOU HIGH TECH INST
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  • Abstract
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Problems solved by technology

This method requires a vacuum system, which is n

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  • Ultrasound spray pyrolysis preparation method of MgO buffer layer for coating conductor
  • Ultrasound spray pyrolysis preparation method of MgO buffer layer for coating conductor
  • Ultrasound spray pyrolysis preparation method of MgO buffer layer for coating conductor

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preparation example Construction

[0020] The object of the present invention is to provide a method for preparing a magnesium oxide buffer layer for coated conductors by ultrasonic spray pyrolysis, which does not require vacuum equipment and is suitable for large-scale industrial production. Using the method of ultrasonic spray pyrolysis, magnesium nitrate solution is used as the precursor solution, and the magnesium oxide buffer layer is epitaxially grown on the NiW alloy substrate through the technology of ultrasonic atomization pyrolysis. The schematic diagram of its preparation device is shown in figure 1 As shown in the figure, the substrate is fixed on the heating platform, and the precursor liquid uses the ultrasonic atomizer to generate mist droplets, and reaches the top of the substrate along the quartz tube, and deposits a film on the substrate after thermal decomposition. Main steps of the present invention are as follows:

[0021] Step 1: cleaning the metal NiW alloy substrate with a high cubic te...

Embodiment 1

[0031] This example is prepared by ultrasonic spray pyrolysis of magnesium oxide buffer layer for coated conductor. The specific process is as follows:

[0032] Step 1, using 99.99% acetone, alcohol and deionized water in order to ultrasonically clean the YBCO superconducting layer of the high-temperature superconducting coating conductor;

[0033] Step 2, suspend and immerse in the diluted nitric acid solution with a concentration of 30%-50% for 40-120s to remove surface oxidation, take it out, wash and dry;

[0034] Step 3 Fix the cleaned cubic-textured metal NiW alloy substrate on a heating table, the distance from the nozzle to the substrate is 4 cm, and then heat to 580° C.

[0035] Step 4: Use 0.3mol / L magnesium nitrate solution as the precursor solution, use an ultrasonic atomizer to atomize and spray the precursor solution on the NiW alloy substrate, spray for 20 seconds, stop for 40 seconds and repeat the spraying method, lasts 10 minutes in total;

[0036] Step 5,...

Embodiment 2

[0038] This example is prepared by ultrasonic spray pyrolysis of magnesium oxide buffer layer for coated conductor. The specific process is as follows:

[0039] Step 1, using 99.99% acetone, alcohol and deionized water in order to ultrasonically clean the YBCO superconducting layer of the high-temperature superconducting coating conductor;

[0040] Step 2, suspend and immerse in the diluted nitric acid solution with a concentration of 30%-50% for 40-120s to remove surface oxidation, take it out, wash and dry;

[0041] Step 3 Fix the cleaned cubic-textured metal NiW alloy substrate on a heating table, the distance from the nozzle to the substrate is 5 cm, and then heat to 590° C.

[0042] Step 4 Use 0.5mol / L magnesium nitrate solution as the precursor liquid, and use an ultrasonic atomizer to atomize and spray the precursor liquid on the NiW alloy substrate. The atomization spraying method is sprayed for 30 seconds, stopped for 60 seconds, and then repeated spraying. lasts fo...

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Abstract

The invention discloses an ultrasound spray pyrolysis preparation method of a MgO buffer layer for a coating conductor. The ultrasound spray pyrolysis preparation method comprises the steps of: with a magnesium nitrate solution as a precursor solution, epitaxially growing the MgO buffer layer on a NiW alloy substrate by using an ultrasound spray pyrolysis technology; fixing the cleaned NiW alloy substrate on a heating platform, and heating the cleaned NiW alloy substrate to 580-630 DEG C; with the magnesium nitrate solution as the precursor solution, atomizing and spraying the precursor solution on the NiW alloy substrate in a way of spraying for 20-60s, stopping for 40-120s and then spraying again by using an ultrasound atomizer, and finally preserving the heat for 30-60min to obtain the MgO buffer layer, wherein the spraying operation lasts for 10-30min in total. The method is free of vacuum systems, high in film forming speed and capable of reducing the production cost and increasing the production efficiency.

Description

technical field [0001] The invention relates to the technical field of preparation of high-temperature superconducting coated conductor buffer layers, in particular to an ultrasonic spray pyrolysis preparation method of a magnesium oxide buffer layer for coated conductors. Background technique [0002] Currently, the power supply is becoming increasingly tight, yet a large amount of power is wasted on traditional cables. According to statistics, the power loss of my country's power grid accounts for about 8-10% of the total power generation, of which about 90% is lost by cables, which is equivalent to the power generation of 2-3 Three Gorges Power Stations. If superconducting strips are used, not only these losses can be completely avoided, but also a large amount of metal materials can be saved. [0003] The superconducting tape based on the yttrium barium copper oxide (YBCO) system is called the second-generation high-temperature superconducting tape, which has a high upp...

Claims

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Application Information

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IPC IPC(8): C23C18/12C23C18/04H01B12/06H01B13/00
CPCY02E40/60
Inventor 刘胜利张颖
Owner NANJING UNIVERSTIY SUZHOU HIGH TECH INST
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