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Preparation method of graphene yttrium niobium copper superconducting material

A superconducting material, graphene technology, applied in the usage of superconducting elements, superconducting devices, superconducting/high-conducting conductors, etc., can solve the problems of high complexity and high equipment requirements, achieve good connectivity, reduce synthesis Difficulty, shape regular effect

Inactive Publication Date: 2017-06-27
SUZHOU SICHUANGYUANBO ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the research and development prospects of superconducting materials are good, but the superconducting performance needs to be further enhanced. In order to meet the application requirements, it is necessary to increase the critical transition temperature and improve its preparation process, and it is necessary to strengthen research in this area
[0005] The process of synthesizing yttrium-niobium-copper superconducting materials at high temperature is generally complex and difficult, or requires high equipment requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Place graphene oxide in ethanol and ultrasonically disperse to obtain a graphene oxide solution. The power of the ultrasonic dispersion is 1200W, and the time of ultrasonic dispersion is 20min; then spherical nano-yttrium powder is added to the graphene oxide solution, and it is filtered after stirring. The filter residue is obtained, and the filter residue is vacuum dried to obtain a mixed powder; the mass of the spherical nano yttrium powder is 50 times the mass of the graphene oxide; and the concentration of the graphene oxide solution is 1 mg / mL.

[0020] The mixed powder is heat-treated in a reducing atmosphere, the temperature of the heat treatment is 500°C, and the heating rate is 20°C / min to obtain graphene-coated yttrium powder; the reducing atmosphere is a mixture of nitrogen and hydrogen Gas, the volume percentage of hydrogen in the mixed gas is 10%.

[0021] Spread the Nb powder with a purity of 99.999% evenly in the quartz boat, put it into the tube furnace, pas...

Embodiment 2

[0027] Place graphene oxide in ethanol and ultrasonically disperse to obtain a graphene oxide solution. The power of the ultrasonic dispersion is 3000W and the time for ultrasonic dispersion is 40min; then spherical nano-yttrium powder is added to the graphene oxide solution, and the mixture is uniformly stirred and filtered. The filter residue is obtained, and the filter residue is vacuum-dried to obtain a mixed powder; the mass of the spherical nano yttrium powder is 80 times the mass of the graphene oxide; and the concentration of the graphene oxide solution is 3 mg / mL.

[0028] The mixed powder is heat-treated in a reducing atmosphere, the temperature of the heat treatment is 800°C, and the heating rate is 50°C / min to obtain graphene-coated yttrium powder; the reducing atmosphere is a mixture of nitrogen and hydrogen Gas, the volume percentage of hydrogen in the mixed gas is 15%.

[0029] Spread the Nb powder with a purity of 99.999% evenly in the quartz boat, put it into the t...

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Abstract

The invention discloses a preparation method of a graphene yttrium niobium copper superconducting material. Yttrium powder is added to a graphene oxide solution to be coated with monolayer grapheme. The graphene is agglomerated after thermal treatment and the yttrium powder can be tightly and uniformly combined. The prepared grapheme-coated yttrium powder has a graphene interface. The preparation method also uses a characteristic that the niobium powder absorb gases, generates hydrogen-containing niobium powder and a micro niobium hydrogen compound by means of the powder physical and chemical effect of the hydrogen and the niobium powder so as to achieve a purpose of refining the niobium powder, greatly reduce the activation energy in the reaction, and reduce synthesis difficulty. The product prepared by the method is simple in process, structured in appearance, dense in surface, good in connectivity, and high in superconducting critical temperature.

Description

Technical field [0001] The invention relates to the field of superconducting materials, in particular to a method for preparing graphene yttrium niobium copper superconducting materials. Background technique [0002] Superconducting material refers to a material that exhibits the properties of resistance equal to zero and repelling magnetic lines of force under certain low temperature conditions. It has been discovered that 28 elements and thousands of alloys and compounds can become superconductors. The production technology of high-temperature superconducting materials has matured with the development of time, the price has also been reduced, and the market competitiveness has continued to increase. It has the advantages of small size, light weight, low loss and large transmission capacity. It is an upgraded product of traditional cables. . [0003] As a superconductor with the highest critical temperature, copper-oxygen compound high-temperature superconductors have been studi...

Claims

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Application Information

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IPC IPC(8): H01B12/00H01B13/00
CPCH01B12/00H01B13/00H01B13/0016Y02E40/60
Inventor 不公告发明人
Owner SUZHOU SICHUANGYUANBO ELECTRONICS TECH CO LTD
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