Composite material for improving metal conductivity and preparation method thereof

A composite material and metal conduction technology, which is applied in the direction of metal material coating process, metal layered products, chemical instruments and methods, etc., can solve the problem of reducing the electrical conductivity of materials, failing to improve electrical conductivity, and unable to form carrier channels and other issues to achieve the effect of excellent conductivity performance

Active Publication Date: 2022-01-18
CRRC IND INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned composite material will cause the disordered fracture of graphene in the hot pressing process, and it is easy to produce some structures with too large graphene fragments and too small or too large distances between graphene fragments. If the distance is too small, the graphene will bear a large stress in the bending state, and cause further disordered fractures, and cannot form a uniform and good carrier channel, thereby reducing the conductivity of the material in bending applications, and the fragment distance When the value is too large, a good carrier channel cannot be formed
In addition, for conventional conductive metals and their alloys, composite materials, etc., due to their single crystal structure different from copper surface and non-high purity, such composite materials obtained in the above-mentioned way cannot improve the corresponding Conductivity and conductivity when bent or bent

Method used

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  • Composite material for improving metal conductivity and preparation method thereof
  • Composite material for improving metal conductivity and preparation method thereof
  • Composite material for improving metal conductivity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]Graphene is deposited on both sides of the 30 μm thick rolled copper foil by CVD method to form continuous single-layer high-quality graphene, and the mass fraction of the graphene in the composite material is controlled to be about 0.0008%, or all The volume fraction of the graphene in the composite material is about 0.003%, and then a graphene-copper foil three-layer structure is obtained, and the graphene is uniformly fractured by stretching, and the 20-layer graphene- The copper foil is formed at a temperature of 920 ° C and a pressure of 45 MPa. The formed graphene-copper composite material is tested by the four-probe method, the conductivity is 119.84% IACS, and the tensile strength is 258 MPa. The bending test (bending test refers to each angle) All were subjected to a certain degree of bending experiment, and the following bending experiments were the same) and the conductivity was 118.91% IACS. The copper on the surface of one side of the graphene-copper composi...

Embodiment 2

[0043] Graphene was deposited on both sides of a 40-μm-thick electrolytic aluminum foil (conductivity 59.1% IACS) by CVD to form continuous multi-layer high-quality graphene, and the mass fraction of the graphene in the composite material was controlled to about is 0.01%, or the volume fraction of the graphene in the composite material is about 0.01%, and then a graphene-aluminum foil three-layer structure is obtained. The graphene-aluminum foil was formed at a temperature of 480°C and a pressure of 15MPa. The formed graphene-aluminum composite material was tested by the four-probe method with a conductivity of 71.52% IACS, a tensile strength of 223MPa, and a conductivity of 69.98 after the bending test. %IACS. The aluminum on the surface of the graphene-aluminum composite material was etched away with an etching solution, and the graphene morphology was exposed and observed by scanning electron microscope. , the morphology is polygonal fragments, each fragment area is 50-100...

Embodiment 3

[0045] Graphene was deposited on both sides of a 20 μm thick silver foil (conductivity 107.8% IACS) by CVD method to form continuous double layers of high-quality graphene, and the mass fraction of the graphene in the composite material was controlled to be about 0.002%, or the volume fraction of the graphene in the composite material is about 0.01%, and then a graphene-silver foil three-layer structure is obtained. The graphene-silver foil was formed at a temperature of 800 °C and a pressure of 40 MPa. The formed graphene-silver composite material was tested by the four-probe method with a conductivity of 127.59% IACS, a tensile strength of 129 MPa, and a conductivity of 129 MPa after the bending test. 126.33% IACS. The silver on the surface of the graphene-silver composite material was etched away by etching solution, and the morphology of graphene was exposed and observed by scanning electron microscope. The results showed that the graphene was evenly distributed in the sil...

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Abstract

The invention relates to a composite material for improving metal conductivity and a preparation method thereof. The composite material is formed by compounding n A-B-A structures, wherein A is a graphene fragment layer, B is a metal foil layer, and n is an integer greater than or equal to 2; the graphene fragment layer comprises graphene fragments which are uniformly laid on the metal foil layer. The conductivity of a conventional metal material is at least improved by more than 18%, and the conductivity of the bent metal material is almost the same as the conductivity of that under a normal condition.

Description

technical field [0001] The invention belongs to the technical field of metal matrix composite materials, and in particular relates to a composite material for improving the electrical conductivity of metals and a preparation method thereof. Background technique [0002] Electricity energy is the most important energy in the production and life of contemporary society. The National Bureau of Statistics shows that the total annual electricity consumption in my country is 7.15 trillion kWh (2018), of which the annual transmission and distribution loss reaches 335.17 billion kWh, equivalent to the Three Gorges 3 Therefore, improving the conductivity of conductive materials can significantly reduce transmission and distribution losses, making a huge contribution to energy conservation and emission reduction. [0003] Document CN106584976A discloses a highly conductive graphene / copper-based composite material and a preparation method thereof, which are based on high-purity and sing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/20B32B3/08B32B15/01B32B33/00B32B37/06B32B37/10C23C16/26C23C16/56
CPCB32B15/20B32B3/08B32B15/01B32B33/00B32B37/06B32B37/10C23C16/26C23C16/56B32B2255/06B32B2255/20B32B2307/546B32B2307/202B32B2037/246
Inventor 裴中正章潇慧柳柏杉梁俊才李要君杨为三陈强王雅伦孙帮成龚明
Owner CRRC IND INST CO LTD
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