氧化石墨烯修饰FeSiCr纳米复合材料的微波吸收性能  

Microwave absorbing performance of FeSiCr/GO nanocomposites

作　　者：熊厚冬 陈洋[1] 王磊[1,2,3] 谭秋兰 张莉丽 钟震晨 XIONG Houdong;CHEN Yang;WANG Lei;TAN Qiulan;ZHANG Lili;ZHONG Zhenchen(Jiangxi Province Key Laboratory for Rare Earth Magnetic Materials and Devices,Jiangxi University of Science and Technology,Ganzhou 341000,China;Jiangxi Yuean Advanced Materials Co.,Ltd.,Ganzhou 341500,China;Ganzhou Lanhai Advanced Materials Co.,Ltd.,Ganzhou 341500,China)

机构地区：[1]江西理工大学,江西省稀土磁性材料及器件重点实验室,江西赣州341000 [2]江西悦安新材料股份有限公司,江西赣州341500 [3]赣州蓝海新材料有限公司,江西赣州341500

出　　处：《有色金属科学与工程》2020年第3期44-51,共8页Nonferrous Metals Science and Engineering

基　　金：国家自然科学基金资助项目(51564037)。

摘　　要：采用等离子体电弧蒸发和表面改性技术制备氧化石墨烯(GO)修饰FeSiCr纳米复合材料(FeSiCr/GO),并对其微波吸收性能进行研究。拉曼光谱结果显示氧化石墨烯与FeSiCr纳米颗粒成功复合。通过TEM对FeSiCr/GO微观形貌进行表征,观察到少量絮状氧化石墨烯点缀于FeSiCr纳米颗粒表面,并且FeSiCr纳米颗粒分布在层状氧化石墨烯周围,形成氧化石墨烯修饰FeSiCr纳米复合材料。通过引入氧化石墨烯,可增加材料的电导率和界面极化能力,使FeSiCr/GO的微波吸收性能显著提升。模拟计算结果显示,在4.3 GHz处,FeSiCr/GO最小反射损耗(RLmin)可达-69.1 dB,调整涂层厚度在1.1~5.0 mm之间变化,其有效吸收频带(RL≤-10 dB)范围为2.6~18 GHz。微波吸收性能的改善可归因于阻抗匹配优化和微波损耗能力增强。FeSiCr/GO nanocomposites were developed by plasma arc discharge and surface modification technology.Raman spectroscopy showed that GO was successfully compounded with FeSiCr nanoparticles.The microscopic morphology of FeSiCr/GO was characterized by TEM and then it was observed that a small amount of floccus GO was dotted on the surface of FeSiCr nanoparticles which were distributed around the layered GO,forming FeSiCr/GO nanocomposites.The adding of GO increased the conductivity and interfacial polarization of FeSiCr/GO and therefore its microwave absorbing properties were significantly improved.The simulation calculation results showed that FeSiCr/GO obtained the best microwave absorbing properties when the minimum reflection loss RLmin)reached-69.1 dB at 4.3 GHz and the effective absorption band(RL≤-10 dB)covered a frequency range of 2.6~18 GHz through adjusting the coating thicknesses from 1.1 to 5.0 mm.The improved microwave absorbing properties could be attributed to the optimized impedance matching and enhanced microwave loss capacity.

关 键 词：FeSiCr/GO 微波吸收材料 阻抗匹配 二维层状结构 

分 类 号：TM271.3[一般工业技术—材料科学与工程] TF125.8[电气工程—电工理论与新技术]