The research is using Supercritical fluid of high diffusivity and permeability. Carbon powder of electromagnetic wave absorption evenly coated on a planking that planking made use of carbon fiber with different alignment direction, and using two piled planking tested electromagnetic wave absorption effect and even effect of Supercritical fluid. In the research, carbon fiber has direction of electromagnetic wave absorption, and parallel direction of carbon fiber and electromagnetic wave has excellent electromagnetic wave absorption effect, after Carbon dust planking of Supercritical fluid and planking of carbon fiber piled. It had excellent electromagnetic wave absorption effect.
