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Preparation method of nanocarbon conductive fiber yttrium-barium-copper superconducting material

A technology of carbon nanofibers and conductive fibers is applied in the field of superconducting material preparation to achieve the effects of improving electrical conductivity, good current-carrying performance and high critical current density

Inactive Publication Date: 2018-05-18
戚明海
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 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

Method used

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Embodiment 1

[0019] The present invention provides the following technical solution: a method for preparing a nano-carbon conductive fiber yttrium-barium-copper superconducting material, comprising the following steps:

[0020] A. Preparation of nano carbon conductive fiber material solution:

[0021] a. Graphite pretreatment: Add sodium fluoride to the nano-graphite powder, add a metal catalyst, mix well, heat at 600°C under the protection of an inert gas, and control the heating time for 10 minutes, and fix sodium fluoride on the nano-graphite powder on the surface;

[0022] b. Pretreatment of carbon nanofibers: oxidize the carbon nanofibers with concentrated sulfuric acid and potassium permanganate in a mixed acid, and after vigorous ultrasonic stirring, obtain carboxylated carbon nanofibers, add a surface treatment agent, heat treatment at 150°C for 10 minutes, and add silver , heated at 400°C for 30 minutes under the protection of a mixed gas of nitrogen and helium to uniformly dispe...

Embodiment 2

[0031] A preparation method of nano-carbon conductive fiber yttrium-barium-copper superconducting material, comprising the following steps:

[0032] A. Preparation of nano carbon conductive fiber material solution:

[0033] a. Graphite pretreatment: Add sodium fluoride to the nano-graphite powder, add a metal catalyst, mix well, heat at 650°C under the protection of an inert gas, and control the heating time for 15 minutes, and fix sodium fluoride on the nano-graphite powder on the surface;

[0034] b. Pretreatment of carbon nanofibers: oxidize the carbon nanofibers with concentrated sulfuric acid and potassium permanganate in a mixed acid, and after vigorous ultrasonic stirring, obtain carboxylated carbon nanofibers, add a surface treatment agent, heat treatment at 200°C for 15 minutes, and add silver , heated at 450°C for 45 minutes under the protection of a mixed gas of nitrogen and helium to uniformly disperse silver in the carbon nanofibers;

[0035] c. Put pretreated g...

Embodiment 3

[0043] A preparation method of nano-carbon conductive fiber yttrium-barium-copper superconducting material, comprising the following steps:

[0044] A. Preparation of nano carbon conductive fiber material solution:

[0045] a. Graphite pretreatment: Add sodium fluoride to the nano-graphite powder, add a metal catalyst, mix well, heat at 625°C under the protection of an inert gas, and control the heating time for 12 minutes, and fix sodium fluoride on the nano-graphite powder on the surface;

[0046] b. Pretreatment of carbon nanofibers: oxidize the carbon nanofibers with concentrated sulfuric acid and potassium permanganate in a mixed acid, and after vigorous ultrasonic stirring, obtain carboxylated carbon nanofibers, add a surface treatment agent, heat treatment at 175°C for 12 minutes, and add silver , heated at 425°C for 40min under the protection of a mixed gas of nitrogen and helium to uniformly disperse the silver in the carbon nanofibers;

[0047] c. Put pretreated gr...

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Abstract

The invention discloses a preparation method of a nanocarbon conductive fiber yttrium-barium-copper superconducting material, which is made from, by weight, 4.2-5.1 parts of graphene-coated yttrium powder, 4.8-5.2 parts of barium oxide, 5.1-5.3 parts of copper oxide, 1.7-1.8 parts of benzoic acid, 2.1-2.2 parts of methyl methacrylate, 1.3-1.5 parts of sodium carboxymethylcellulose, 3.2-3.5 parts of sodium stearate, 2.2-2.5 parts of potassium carbonate, 1.3-1.5 parts of quicklime, and 1.7-1.9 parts of polyethylene glycol. The preparation method is simple. Yttrium powder is added to a nanocarbonconductive fiber material solution, so that nanocarbon conductive fibers coat yttrium powder. The obtained product isn't agglomerated after thermal treatment. The nanocarbon conductive fibers uniformly closely combine with yttrium powder, so that the conductivity of yttrium powder is improved. The obtained product is high in critical transition temperature, good in superconducting performance, high in critical current density, good in current carrying performance, less in energy dissipation, low in production cost, and high in practical value.

Description

technical field [0001] The invention relates to the technical field of superconducting material preparation, in particular to a method for preparing a nano-carbon conductive fiber yttrium-barium-copper superconducting material. Background technique [0002] A superconducting material refers to a material that exhibits the properties of zero resistance and repelling magnetic lines of force under certain low temperature conditions. Superconducting cable is a cable designed and manufactured by utilizing the characteristics of superconductivity becoming superconducting state under its critical temperature, disappearing resistance, minimal loss, high current density, and being able to carry human current. Superconducting cables are essentially cryogenic cables, and the principle is that the resistivity decreases as the temperature drops. With the gradual development of science and technology, high-temperature superconducting materials will be widely used in fields such as electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/45C04B35/628C04B35/622C04B35/80H01B12/00H01B13/00B82Y30/00
CPCB82Y30/00C04B35/4508C04B35/622C04B35/62839C04B35/803C04B2235/3201C04B2235/3208C04B2235/3215C04B2235/40C04B2235/425C04B2235/5248C04B2235/656C04B2235/6582H01B12/00H01B13/00Y02E40/60
Inventor 戚明海
Owner 戚明海
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