▎ 摘　　要

NOVELTY - The material has an electromagnetic absorbing material comprising a silicon carbide. A conductive material comprises a two-dimensional carbon material containing one of a graphite sheet and a graphene sheet. The composite material comprises a carbon nanotube. The graphene sheet is prepared by performing cavitation process on a raw material of carbon in liquid phase exfoliation, where solvent used in the liquid phase is selected from water, ethanol, and nitrogen monophosphate (NMP), and solid content of the raw material is about 1-10 wt.%. USE - Composite material for shielding or absorbing electromagnetic wave in an electronic device e.g. smart phone, tablet and laptop. ADVANTAGE - The composite material has high absorption and low reflectance for electromagnetic waves, and the two-dimensional carbon material containing at least one of the graphite sheet and graphene sheet may have good conductivity. The electric energy converted from the electromagnetic waves can be further converted to a heat energy and then be consumed through heat transfer, so that the composite material may have a good electromagnetic shielding or electromagnetic absorbing effect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for manufacturing a composite material for shielding or absorbing electromagnetic wave in an electronic device.