Topological designed Fe3O4@C/rGO gradient architecture with enhanced microwave absorption

Next Materials Pub Date : 2024-09-17 DOI:10.1016/j.nxmate.2024.100376

Zihao Chen , Miao Li , Xiaoxiao Huang , Yewei Zhang , Yu Zhang , Bin Yang , Guanghui Cui , Tao Zhang , Xiaobo Gong

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Abstract

Microstructure and composition are critical strategies to obtain high-performance electromagnetic wave (EMW) absorbing materials. In this study, Fe₃O₄@C and Fe₃O₄@C/rGO were synthesized by the hydrothermal method. Subsequently, a gradient structure was designed to further optimize the EMW absorption performance of composition using CST software. The electromagnetic parameters of the EMW absorbing materials were utilized to design the gradient structure by employing a genetic algorithm to determine the optimal thickness. The results indicate that the gradient structure of Fe₃O₄@C and Fe₃O₄@C/rGO demonstrate exceptional EMW absorption performance with the minimum reflection loss (RL_min) of −50.26 dB at 9.73 GHz and the effective absorption bandwidth (EAB) of 3.86 GHz (2.04 GHz-2.85 GHz, 8.57 GHz-11.62 GHz). Finally, the proposed system was validated using the waveguide method, revealing that the experimental curves align closely with simulated curves, thereby confirming the feasibility of this structure.

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拓扑设计的 Fe3O4@C/rGO 梯度结构具有更强的微波吸收能力

微观结构和成分是获得高性能电磁波吸收材料的关键策略。本研究采用水热法合成了 Fe3O4@C 和 Fe3O4@C/rGO。随后，利用 CST 软件设计了梯度结构，进一步优化了成分的电磁波吸收性能。利用电磁波吸收材料的电磁参数设计梯度结构，采用遗传算法确定最佳厚度。结果表明，Fe3O4@C 和 Fe3O4@C/rGO 的梯度结构具有优异的电磁波吸收性能，在 9.73 GHz 时的最小反射损耗 (RLmin) 为 -50.26 dB，有效吸收带宽 (EAB) 为 3.86 GHz（2.04 GHz-2.85 GHz，8.57 GHz-11.62 GHz）。最后，利用波导法对拟议系统进行了验证，结果表明实验曲线与模拟曲线非常吻合，从而证实了这种结构的可行性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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