Material adopting thin graphene and metal powder composite structure, preparation method and application thereof

A technology of thin-layer graphene and metal powder, applied in the direction of non-metal elements, chemical instruments and methods, carbon compounds, etc., can solve the problems of easy oxidation or corrosion, high cost of metal powder, active chemical properties, etc., to achieve Enhance oxidation resistance and corrosion resistance, reduce system cost and prolong service life

Active Publication Date: 2013-07-10
苏州格瑞丰纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Metal powders such as Fe, Ni, Cu, and Ag have excellent electrical and thermal conductivity, and are widely used in antistatic, electromagnetic shielding, conductive paste, heat conducting agent, catalyst, etc. However, the cost of metal powder is high , active chemical properties, easy to be oxidized or corroded, so the service life is limited

Method used

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  • Material adopting thin graphene and metal powder composite structure, preparation method and application thereof
  • Material adopting thin graphene and metal powder composite structure, preparation method and application thereof
  • Material adopting thin graphene and metal powder composite structure, preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0043] Example 1: Put 5g of nickel powder into a quartz tube, and pass through argon: 100 sccm, hydrogen 200 sccm for 15 min. Raise the tube furnace to 900°C, the atmosphere environment is: hydrogen: 200 sccm, argon: 100 sccm, methane: 30 sccm; keep the air pressure at 500 torr for 30 minutes. After the growth is completed, pass argon gas at 200 sccm until the quartz tube cools down to obtain multilayer graphene-coated nickel powder, whose morphology can be found in Figure 2a and Figure 2b and image 3 .

Embodiment 2

[0044] Embodiment 2: 5g of nickel nickel chloride powder and 500mg of expanded graphite are ball milled and mixed, put into a quartz tube, and pass through argon: 100sccm, hydrogen 200sccm for 15min. Raise the tube furnace to 900°C, the atmosphere environment is: hydrogen: 200 sccm, argon: 100 sccm, methane: 30 sccm; keep the air pressure at 500 torr for 30 minutes. After the growth is completed, pass argon gas at 200 sccm until the quartz tube cools down to obtain nickel powder covered by multi-layer graphene. The characterization results can be found in Figure 4 .

Embodiment 3

[0045] Example 3: Stir and mix the saturated nickel chloride solution and the graphene oxide solution, freeze-dry, put into a tube furnace, keep at 600°C for 10 minutes, and the atmosphere is: hydrogen: 300 sccm, argon: 100 sccm. Then raise the tube furnace to 1000°C and keep it at 1000°C for 10 minutes. At this time, the atmosphere is: methane: 30sccm, hydrogen: 200sccm, argon: 200sccm, keep it for 10 minutes, take out the quartz tube and cool it to room temperature to obtain graphene Nickel powder lapped and clad.

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Abstract

The invention discloses a material adopting a thin graphene and metal powder composite structure, a preparation method and an application thereof. The material adopting the composite structure comprises metal powder bridged by and coated with thin graphene. The preparation technology of the material comprises the steps as follows: mixing transition metal powder or reduced transition metal powder with the thin graphene, and growing the thin graphene on the surface of the transition metal powder through CVD (chemical vapor deposition) and coating the surface of the transition metal powder with the thin graphene, so as to obtain the metal powder bridged by and coated with the thin graphene; or growing the thin graphene on the surface of the transition metal powder through the CVD, and then compositing the metal powder with the thin graphene to obtain a target product. The invention has the advantages that the technology is simple; the oxidation resistance and the corrosion prevention of the metal powder can be enhanced, meanwhile, the metal powder has good heat conduction, antistatic and electromagnetic shielding properties, the service life of the metal powder can be prolonged, and the cost can be reduced; and besides, the material has a wide application prospect in antistatic performance, thermal management, heat conduction and radiation, electromagnetic shielding, catalysts, sintering activators, electro-conduction slurry, batteries, cemented carbide and the like.

Description

technical field [0001] The invention particularly relates to a thin-layer graphene / metal powder composite structure material, its preparation method and application, and belongs to the field of material science. Background technique [0002] Metal powders such as Fe, Ni, Cu, and Ag have excellent electrical and thermal conductivity, and are widely used in antistatic, electromagnetic shielding, conductive paste, heat conducting agent, catalyst, etc. However, the cost of metal powder is high , active chemical properties, easy to be oxidized or corroded, so the service life is limited. Contents of the invention [0003] One of the purposes of the present invention is to provide a thin-layer graphene / metal powder composite structural material, which has good thermal conductivity, antistatic, electromagnetic shielding, anti-oxidation and anti-corrosion properties, and has a long service life, thereby overcoming the existing technology. deficiencies in. [0004] Another object...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B22F9/24C01B31/04C01B32/194
Inventor 刘立伟李伟伟高嵩邱胜强郭玉芬徐建宝朱超魏相飞
Owner 苏州格瑞丰纳米科技有限公司
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