石墨烯
材料科学
反射损耗
复合数
复合材料
微波食品加热
氧化物
微观结构
介电损耗
电介质
吸收(声学)
纳米技术
光电子学
冶金
量子力学
物理
作者
Ying Wang,Yunchen Du,Rong Qiang,Chunhua Tian,Ping Xu,Xijiang Han
标识
DOI:10.1002/admi.201500684
摘要
Graphene‐based composites offer immense potential for overcoming the challenges related to the performance, functionality, and durability in microwave absorption. In this study, a sandwich‐like graphene‐based composite is successfully fabricated by an interfacial engineering of amorphous carbon microspheres (ACMs) and reduced graphene oxide (rGO), with a structure of rGO/ACMs/rGO. The as‐prepared rGO/ACMs/rGO composite presents comparable/superior reflection loss characteristics in the frequency range of 2.0–18.0 GHz to previous composites of graphene and high‐density magnetic particles. Electromagnetic parameters and simulation results reveal that well‐matched characteristic impedance and proper dielectric loss, as well as multiple reflections and interfacial polarizations derived from the unique microstructure should account for the enhanced microwave absorption of rGO/ACMs/rGO. More importantly, rGO/ACMs/rGO exhibits durable performance after being treated at high temperature for a long time. This work provides a new idea for exploring high‐performance and durable microwave absorbers of graphene‐based materials.
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