Method and device for producing high-strength and high-conductivity graphene copper-based powder material

Abstract

The invention provides a preparation method and device for producing a high-strength and high-conductivity graphene copper-based powder composite. The preparation method is characterized in that a melt copper gas atomizing type powder preparation technology is adopted, a multi-gas-channel controllable gas feeding system and a controllable gas scrubbing device are additionally arranged at the outer part of an atomizing chamber of a traditional powder preparation device, and a gradual temperature control device and a material speed reduction device are additionally arranged in the atomizing chamber, and on that basis, high-temperature melt copper can be atomized into fine high-temperature melt copper droplets under the impacting effect of high-speed gas flow, and then the high-temperature melt copper droplets enter an atomizing chamber atmosphere containing carbon source gas components with a certain ratio, thus a graphene material can realize in-situ wrapping growth on the surfaces of copper powder particles when the atomized melt copper droplets are subjected to temperature-controlled solidification and / or under the speed reduction effect of the material speed reduction device, and as a result, the high-strength and high-conductivity graphene copper-based powder composite can be obtained. The preparation method and the preparation device can be directly applied to an existing copper-based material atomizing type powder preparation industry; the prepared product is high in performance and additional value; the preparation method and the preparation device are applicable to technology improvement and product upgrading of a copper powder production industry.

Description

technical field [0001] The invention belongs to the technical field of preparation of novel functional powder materials, and in particular relates to a method and a device for producing graphene copper-based powder composite materials with high strength, high thermal conductivity and high conductivity. Background technique [0002] As a basic industrial material, copper powder is widely used in the world's auto industry parts, heat dissipation modules, electronic appliances, friction materials, conductive inks, oil bearings, electrical appliances, etc. Contact materials, electric carbon products, chemical contacts, diamond tools, filters, mechanical parts processing, electrical alloys and other fields, quasi-spherical and spherical copper powders are used in injection molding, welding materials, electronic material production fields, and play an important role in industrial production. play an important role. [0003] Due to reasons such as energy consumption and environmen...

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned technical means for obtaining graphene / copper-based composite materials can be divided into two categories. One is to physically blend copper powder and graphene materials, and then perform corresponding post-processing to obtain composite materials. This technical route is still not available. Solve the problem of good dispersion and compatibility between two-phase materials; the other is to pre-treat copper powder, and then grow graphene to obtain composite materials. This technical route better solves the problem of two-phase materials. Excellent dispersion and compatibility, but the pretreatment of copper powder is complicated and time-consuming, and the quality of pretreatment has a great impact on the quality of later products, so it is not suitable for large-scale production

Images