Fe_3O_4空心球/石墨烯复合吸波材料的制备及其性能

利用化学法制备氧化石墨烯(GO)与石墨烯(RGO),然后以水热法制备Fe3O4空心球/RGO复合吸波材料。XRD测试结果表明成功合成了具有立方结构的Fe3O4;SEM,TEM分析结果表明复合材料结构分布均匀,粒径约为100 nm。测试了材料在2~18 GHz波段的电磁参数,模拟计算了材料的反射率,结果显示复合材料的吸波性能比RGO有明显提升。当匹配厚度为7 mm时,复合材料具有两个吸收峰:在5.5 GHz处吸收峰为–9.5 d B,在16.5GHz处出现最大吸收峰–36 d B。

Preparation and Microwave Absorbing Properties of Fe3O4 Hollow Sphere/RGO Composite

Graphene oxide （GO） and reduced graphene oxide （RGO） were prepared by the oxidation-reduction method, and then Fe3O4 hollow sphere/RGO composite was prepared by solvothermal method. XRD,SEM and TEM tests were carried to confirm the structural and microstructures of RGO and Fe3O4 Hollow sphere/RGO composite. The complex relative permittivity and permeability in the frequency range of 2-18 GHz were measured. The reflection loss curves of the materials were calculated using computer simulation. The microwave absorbing property of Fe3O4 hollow sphere/RGO was significantly better than that of RGO. When the matching thickness was 7 mm,there were two absorbing peaks：-9.5 dB at 5.5 GHz, 36 dB at 16.5 GHz, respectively.