用于无线通信的磁纳米合金/石墨烯复合型吸波材料设计  

Design of Magnetic Nanoalloy/Graphene Composite Absorbing Materials for Wireless Communication

作　　者：雨田 曾昱霖 肖晓灵 周子靖 李均[1] YU Tian;ZENG Yulin;XIAO Xiaoling;ZHOU Zijing;LI Jun(School of Physical Sciences,Harbin Institute of Technology,Harbin 150006)

机构地区：[1]哈尔滨工业大学物理学院,哈尔滨150006

出　　处：《飞控与探测》2025年第1期96-104,共9页Flight Control & Detection

基　　金：国家自然科学基金(U2130110,51502054);中央高校基本科研业务费专项资金(2023FRFK06003)。

摘　　要：移动通信和电子设备的普及促进了社会进步。然而,随之产生的电磁污染等问题严重降低信息传递的质量,同时损害生物体的健康。磁/介电复合材料凭借良好的电磁损耗和阻抗匹配展现出优异的电磁波吸收性能,已成为人们研究的重点。采用碳热还原法制备出3种磁纳米合金/石墨烯复合材料。结果表明,随着烧结温度提升,石墨烯缺陷密度的增加导致介电常数降低,而FeCoNi合金因其高饱和磁化强度展现出较高的磁导率,使复合材料的阻抗匹配得到优化。因此获得最小反射损耗值为-63.8 dB,有效吸收带宽为4.24 GHz的FeCoNi/石墨烯复合型吸波材料。此外,雷达散射截面结果表明,FeCoNi/石墨烯复合材料在模拟真实环境中具有良好的电磁衰减能力,因此该吸波材料有望在复杂电磁环境中得到应用。The popularity of mobile communication and electronic devices has promoted social progress.However,the resulting electromagnetic pollution problems seriously reduce the quality of information transmission,and harm the health of organisms.Magnetic/dielectric composites exhibit excellent electromagnetic wave absorption properties due to good electromagnetic loss and impedance matching,which has become the focus of research.In this paper,three kinds of magnetic nanoalloy/graphene composites are prepared by the carbothermal reduction method.The results indicate that with the increase of sintering temperature,the increased defect density of graphene results in a decrease in permittivity,and the FeCoNi alloy exhibits high permeability attributed to its high saturation magnetization,which together optimizes the impedance matching of the composite.Therefore,FeCoNi/graphene composite absorbing material with a minimum reflection loss value of-63.8 dB and an effective absorption bandwidth of 4.24 GHz has been obtained.Moreover,the radar cross section results show that FeCoNi/graphene composite has good electromagnetic attenuation ability in simulated real environments,thus such the absorbing material is expected to be applied in complex electromagnetic environments.

关 键 词：磁性纳米合金 石墨烯 电磁波吸收 雷达散射截面 移动通信 

分 类 号：O441.4[理学—电磁学]