Conductive graphene-coated copper-coated wire and its preparation method and use

Abstract

The invention relates to a lead manufactured and obtained by coating copper with conductive graphene, and a manufacturing method and an application thereof. The conductive graphene is uniformly dispersed in a copper matrix, and a mass ratio of graphene to copper is 1-5: 1000. The lead has excellent comprehensive performance of conductive efficiency, a self-lubricating property, strength, hardnessand dimensional stability.

Description

technical field [0001] The invention belongs to the technical field of composite wire preparation, and in particular relates to a conductive graphene-coated copper-coated wire and a preparation method and use thereof. Background technique [0002] As a wire material, pure copper is easy to break during the weaving process, it is difficult to weld between wires, it is easy to be oxidized, and it is easy to chemically react with the free sulfur in the cable to affect the stability of conductivity. Therefore, the market urgently needs a more economical and better wire material. Especially when used in special fields such as high-speed rail wires, subway wires, aerospace ultra-fine wires, etc., it also needs to have the characteristics of high conductivity, lubricity, high hardness, high heat dissipation, and good dimensional stability. [0003] The properties of alumina-copper composite conductors currently used in high-speed rail are 85% electrical conductivity, 300% hardness...

AI Technical Summary

Problems solved by technology

CN206810144U discloses a special stirring and mixing device for graphene powder and copper powder, which can improve the mixing uniformity of graphene and copper powder, but still cannot completely solve the problem of mixing uniformity from a microscopic point of view. In addition, in this patent It only mentioned the mixing of graphene and copper powder, and did not provide the mixing ratio, and did not improve how to use the mixed powder further

CN107723500A discloses a graphene-alumina hybrid reinforced copper-based composite material and its preparation method. The composite material contains the following components in weight percentage: graphene 0.1-1.0wt%, Al 2 o 3 1.0-1.2wt%, and the balance is copper. According to the patent, in the case of adding graphene alone as a reinforcement, the prepared alloy material has better electrical conductivity and friction performance, but the strength is very low, and the overall performance of the alloy is poor. ; In the case of adding alumina alone as a reinforcement, the microhardness of the prepared alloy material is better, but the friction performance is poor, and the volume wear rate is higher; while adding graphene and alumina as a composite reinforcement, Although the electrical conductivity of the prepared alloy material has slightly decreased, the strength and friction properties of the alloy have been greatly improved, and the comprehensive performance is excellent.

However, in fact, the best experimental data of the electrical conductivity of the alloy material disclosed in this patent is only 85.0% IACS, and in addition, its tensile strength performance is only about 400MPa

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