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Facile synthesis of core-shell CI/SiO2 decorated RGO sheets composite for excellent electromagnetic wave absorption performance covering the whole X-band
Composites Part A: Applied Science and Manufacturing ( IF 8.1 ) Pub Date : 2019-12-29 , DOI: 10.1016/j.compositesa.2019.105755
Kaili Zhang , Juan Chen , Shoujing Yue , Haiyan Zhang , Chao Meng , Jigang Wang

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.



中文翻译:

核-壳CI /二氧化硅的简便合成2个装饰片RGO复合为覆盖整个优异的电磁波吸收性能X波段

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。

更新日期:2019-12-29
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