Graphene/metal composite material and preparation method thereof

A technology of metal composite materials and graphene, which is applied in the field of composite materials, can solve the problems of easy introduction of impurities, no formation of chemical bonds, unavoidable graphene agglomeration, etc., and achieve the effect of reducing production costs

Active Publication Date: 2018-06-12
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of metal / graphene composites by powder metallurgy and other methods is difficult to avoid the agglomeration of graphene, and the preparation process is easy to introduce impurities. More importantly, the metal-carbon is only mechanically bonded, and no real chemical bond is formed. The conductivity enhancement effect is not ideal

Method used

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  • Graphene/metal composite material and preparation method thereof
  • Graphene/metal composite material and preparation method thereof
  • Graphene/metal composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The graphene / metal composite material of this embodiment is made of the following raw materials in mass percentage: Ag 90%, C 10%. Among them, Ag is a rod material with a purity of 99.99% and a diameter of 5 mm, and the high-purity carbon rod is a graphite rod whose purity meets the requirement of spectral purity, and the diameter of the graphite rod is 1 mm. figure 1 Shown is the schematic diagram of preparing graphene / silver composite material by melting directional solidification method in the electron beam suspension zone of this embodiment, as figure 1 As shown, the specific preparation method of the present embodiment is:

[0030] (1) be 90% according to the mass percent of silver rod and graphite rod: take silver rod and graphite rod in the ratio of 10%;

[0031] (2) Place the weighed silver rod and graphite rod in an acetone solution for ultrasonic cleaning to remove surface impurities and pollutants, and dry them after cleaning. Then, the two ends of the silv...

Embodiment 2

[0036] The graphene / metal composite material of this embodiment is made of the following raw materials in mass percentage: Ag 85%, C 15%. Among them, Ag has a purity of 99.99% and is in the shape of a rod with a diameter of 5 mm. The high-purity carbon rod is a graphite rod whose purity meets the requirement of spectral purity, and the diameter of the graphite rod is 1 mm. figure 2 The schematic diagram of preparing graphene / silver composite material by melting and directional solidification in the induction heating suspension zone provided by the embodiment of the present invention, as figure 2Shown, the concrete preparation method of this graphene / silver composite material is:

[0037] (1) intercept the long above-mentioned silver rod of 20cm, take its quality, then be 85% according to the mass percentage of above-mentioned silver rod and above-mentioned graphite rod: 15% take graphite rod;

[0038] (2) Place the weighed silver rod and graphite rod in an acetone solution ...

Embodiment 3

[0043] The graphene / metal composite material of this embodiment is made of the following raw materials in mass percentage: Ag 70%, C 30%. Among them, Ag has a purity of 99.99% and is in the shape of a rod with a diameter of 5 mm. The high-purity carbon rod is a graphite rod whose purity meets the requirement of spectral purity, and the diameter of the graphite rod is 1 mm. image 3 The schematic diagram of preparing graphene / silver composite material by melting and directional solidification in the resistance heating suspension zone provided by the embodiment of the present invention, as image 3 Shown, the concrete preparation method of this graphene / silver composite material is:

[0044] (1) intercept the long above-mentioned silver rod of 20cm, take its quality, then be 70%: 30% take graphite rod according to the mass percentage of above-mentioned silver rod and above-mentioned graphite rod;

[0045] (2) Place the weighed silver rod and graphite rod in an acetone solution ...

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Abstract

The invention discloses a graphene / metal composite material and a preparation method thereof. The method comprises the following steps of: (1) weighing a metal rod and a high-purity carbon rod in percentage by mass, wherein the high-purity carbon rod accounts for 1%-30%; (2) clamping the cleaned metal rod on an upper chuck and a lower chuck of a withdrawing system of a directional solidification furnace adopting a floating zone method, clamping the high-purity carbon rod on a clamp beside the withdrawing system, and enabling the bottom end of the high-purity carbon rod to be in contact with amelting zone of the metal rod; and (3) performing vacuum-pumping on the directional solidification furnace adopting the floating zone method, performing directional solidification on the metal rod, controlling length of a melting zone to be 1-50 mm, moving the metal rod from top to bottom at a rate of 1-5000 [mu]m / s, and rotating along the axis of the withdrawing system; and enabling the bottom end of the high-purity carbon rod to be within the melting zone of the metal rod all the time. According to the graphene / metal composite material obtained by the method disclosed by the invention, carbon exists in a metal lattice in the form of graphene, and the two-phase interface is good in combination, so that conductivity of the material is favorably improved.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a graphene / metal composite material and a preparation method thereof. Background technique [0002] Graphene is a two-dimensional nanomaterial composed of carbon atoms that are densely packed with sp2 hybrid connections. It has good thermal conductivity of 5000W / (m·K), and a charge mobility of up to 15000cm2 / (V·s) at room temperature. Electron transport has pronounced quantum effects, manifested as ballistic transport, through which electrons can flow without scattering. Therefore, graphene has extremely high current transmission capacity, and the current density can reach 1×1010A / cm2, which is several orders of magnitude higher than the currently used copper or aluminum wires, and is an ideal conductor. In addition, the strength of graphene is as high as 1.01Tpa, which is 100 times that of structural steel, but its density is 1 / 5 of that of structural steel. However, graphen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C5/06C22C9/00C22C13/00C22C5/04C22C19/03C22C27/04C22C19/07C22C14/00C22C21/00C22C18/00C22C5/02C22C11/00C22C28/00C22C38/00C22C27/06C22C30/02
Inventor 高召顺左婷婷肖立业韩立许壮孔祥东马玉田刘俊标丁发柱古宏伟
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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