Microwave Absorption Properties And Characterization For Fe₃O₄/Pani/Graphene Composites Materials

In recent years, in order to reduce radar reflection and prevent electr omagnetic interference absorbing material growing applications in the milit ary and civilian aspects. Polyaniline/graphene composite absorbing materia 1 due to the synthesis and properties of controllability, attracted widespre ad attention. In order to achieve high frequency microwave absorption fre quency of strong absorption effect, the main research content of this pape r carried out as follows:Prepared by hydrothermal method utilizing two kinds of Fe3O4 Nanop articles particles studied in absorbing properties including reaction time a nd temperature, including the impact of the environment on the different reactions of the hollow particles, explores Fe3O4 nanospheres particles holl ow and solid two structures aspects of performance, including solid Fe3O4 nanoparticles at the frequency 6.10GHz microwave absorption frequency reached-4.182dB; and more excellent hollow Fe3O4 nanoparticles at the fr equency 5.59GHz microwave absorption frequency reached-3.147dB.The Fe3O4 nanoparticles and polyaniline particles were both graphene composite, while regulating the ratio of quality and polyaniline doped pol yaniline ratio:iron oxide= 0.3:1,0.4:1,0.5:1,0.6:1, wherein the mass ratio o f 0.3:1 in 5.5mm material,6.12GHz near the maximum reflection absorptio n loss of -3.73dB, compared with the hollow of Fe3O4, toward the lower f requency cellular absorption bands.Preparation of Fe3O4/graphene composite core-shell materials, compare d with hollow Fe3O4 monomer, at 1.5mm thickness, the absorption peak s hifts to the high frequency of 11.2GHz, and there is a maximum absorptio n intensity-10.66dB, it is likely due to the high conductivity of graphene, graphene show for regulatory properties of the composite dielectric loss absorbing materials higher, match the permeability tetroxide body better.In Fe3O4/graphene composite, based on the continued and after the p olyaniline prepared Fe3O4/graphene/polyaniline three composites, compared Fe3O4/graphene composites, at a thickness of 1.5mm, the three absorptio n material moving to a higher 15.96GHz, and there is a maximum absorpt ion intensity-24.56dB, reaching more excellent absorbing properties, show polyaniline/graphene composites than graphene for absorbing composite material having more excellent conductivity, dielectric loss greater regulati on of its material properties, and better matching permeability tetroxide b ody.