Graphene-containing graphene/ceramic conductive composite material and preparation method thereof

Abstract

The invention discloses a graphene-containing graphene / ceramic conductive composite material and a preparation method thereof, and belongs to the field of preparation of conductive materials. The preparation method mainly comprises the following steps: preparation of a graphite skeleton, strengthening treatment of the skeleton, preparation of a ceramic slurry, casting and drying of graphite / ceramic, and sintering. The graphite / ceramic conductive composite material prepared through the method is prepared by directly controlling composition components and the size structure of the graphite and improving the strengthening post-treatment of the conductive performance of the graphite skeleton, the sintering process and the drying process. The addition of graphene improves the internal loose porous structure problem of the graphite skeleton, increases conductive pathways, improves the strength of the graphite skeleton, and improves the conductive performance of the material while ensuring mechanical performances. The graphite / ceramic composite material has the conductive performance of the graphite, and also has the structure characteristics of ceramic.

Description

technical field [0001] The invention belongs to the field of preparation of conductive materials, and in particular relates to a preparation method of a composite conductive ceramic material. Background technique [0002] Conductive carbon materials such as carbon nanotubes, graphene, carbon fibers, etc. are good conductors of electricity, and have acid and alkali resistance, high melting point, non-toxic, radiation resistance, sufficient raw materials, and low prices. In recent years, it is a commonly used conductive filler for conductive composite materials. Therefore, the composite material made of graphite and alumina ceramics can have the electrical conductivity of graphite, and at the same time have the structural characteristics of ceramics, such as stable chemical properties, high temperature resistance, corrosion resistance, oxidation resistance, etc., and has broad prospects. However, the current traditional production process is to add a large amount of graphite ...

AI Technical Summary

Problems solved by technology

However, the current traditional production process is to add a large amount of graphite to the ceramic powder and then mix it. This not only reduces the mechanical properties of the composite material compared with the original matrix material, but also the graphite is granular, and it does not have a certain structure. Under the current situation, it cannot be adjusted according to the characteristics of the conductive network line to improve the conductive performance, and there is a mismatch between the mechanical properties and the conductive properties.

At the same time, the interior of the graphite skeleton prepared by 3D printing technology is easy to be loose and porous, which also affects the electrical conductivity and mechanical properties of the composite material.

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