Controllable synthesis of FeSe2/rGO porous composites towards an excellent electromagnetic wave absorption with broadened bandwidth

材料科学 微波食品加热 多孔性 复合材料 反射损耗 衰减 电磁辐射 阻抗匹配 吸收(声学) 带宽(计算) 石墨烯 电阻抗 复合数 光学 纳米技术 电气工程 计算机科学 电信 物理 工程类
作者
M. Zeeshan Ashfaq,Aamna Ashfaq,Hongyu Gong,Nayab Akhtar,Muhammad Ahmad,Adil Saleem,Muhammad K. Majeed,Shan Wang,Rashid Iqbal,Yujun Zhang
出处
期刊:Ceramics International [Elsevier BV]
卷期号:49 (4): 5997-6005 被引量:14
标识
DOI:10.1016/j.ceramint.2022.10.140
摘要

Due to the escalating demand for electronic dependability and defense security, there has been a surge in research into broadband and lightweight microwave absorbers. Porous composites that are lightweight and plentiful in interfaces have the potential to be high-performance absorbers due to their ability to attenuate waves in a balanced manner and match impedance. “Using a solvothermal technique we generated FeSe 2 /rGO composites with a porous topology. By varying the weight of rGO, the electromagnetic properties of FeSe 2 /rGO composites may be finely tuned. Impedance matching and attenuation capability are both improved as a direct result of the porous structure and the appropriate electromagnetic parameters. FeSe 2 /rGO composites benefit from the tunable composition, porous structure, and strong synergistic effect between FeSe 2 and rGO sheets and display outstanding microwave absorption performance with an ultrabroad bandwidth approaching 5.2 GHz with a thin thickness of 1.6 mm which covers 75% of the studied frequency range. At the same thickness, a significant reflection loss of −43.7 dB is attained. This work not only enables the tuning of electromagnetic parameters but also expands the use of high-performance microwave absorption devices. Remarkable microwave absorption ability, of the porous composites FeSe 2 /rGO can be utilized as a high-performance microwave absorber.”
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