In this work, the core-shell carbonyl iron/SiO₂ (CI/SiO₂) decorated reduced graphene oxide (RGO) was prepared. The introduction of the wave transparent medium SiO₂ could make the EM wave easier to enter the material, thus effectively improving the impedance matching of the absorber. Moreover, the unique structure led to Debye relaxation, natural resonance and space charge polarization multi-loss mechanisms which greatly improved the attenuation ability of the absorber. As a result, the EM wave absorbing properties of CI/SiO₂/RGO was significantly enhanced. The maximum reflection loss (RL) of CI/SiO₂/RGO composite reached -46.43 dB at 10.79 GHz and the effective absorption bandwidth (RL < -10 dB) was 6.47 GHz covering the whole X frequency band. Meanwhile, the simulation results show that the radar cross section (RCS) can be effectively reduced by coating the CI/SiO₂/RGO. Therefore, the CI/SiO₂/RGO composite can be used as an ideal absorber in the EM field and aerocraft stealth design.

在这项工作中，制备了核-壳羰基铁/ SiO ₂（CI / SiO ₂）装饰的还原氧化石墨烯（RGO）。透波介质SiO ₂的引入可以使电磁波更容易进入材料，从而有效地改善了吸收体的阻抗匹配。此外，独特的结构导致了德拜弛豫，自然共振和空间电荷极化多重损失机制，从而大大提高了吸收体的衰减能力。结果，CI / SiO ₂ / RGO的EM波吸收特性显着增强。CI / SiO ₂的最大反射损耗（RL）/ RGO复合材料在10.79 GHz时达到-46.43 dB，覆盖整个X频段的有效吸收带宽（RL <-10 dB）为6.47 GHz 。同时，仿真结果表明，通过涂覆CI / SiO ₂ / RGO可以有效地减小雷达截面（RCS）。因此，CI / SiO ₂ / RGO复合材料可用作电磁场和飞机隐身设计的理想吸收体。