摘要
随着无线信息技术的飞速发展,电磁干扰问题日益突出,引起了全球的广泛关注。人体长时间暴露于电磁辐射下,会对中枢神经系统、心血管系统和视觉系统等造成不同程度的损伤。解决这一问题的关键在于开发能够吸收电磁波的材料。为了改善还原氧化石墨烯(RGO)的微波吸收性能,采用感应加热的方式成功获得四面体针状氧化锌(ZnO),并通过简单水热法制备了不同比例的ZnO@RGO复合材料。利用SEM、XRD和Raman分别对ZnO@RGO复合材料的形貌、尺寸和结构进行了分析,并且探讨了ZnO含量和石蜡填充量对其电磁参数和吸波性能的影响。ZnO∶GO质量比为3∶1时的ZnO@RGO复合材料拥有最为优异的吸波性能(-44.5 dB;3 mm)。电磁参数表明ZnO@RGO复合材料的衰减机制可以归结为电导损耗和极化效应。ZnO@RGO复合材料具有较低的反射损耗值和较薄的厚度,在军事隐身领域具有很大的潜力。
With the rapid development of wireless information technology,electromagnetic interference has become a prominent problem,which has attracted worldwide attention.Exposure to electromagnetic radiation for a long time will damage the central nervous system,cardiovascular system and visual system to varying degrees.The key to solving this problem is to develop materials that can absorb electromagnetic waves.In order to improve the microwave absorption properties of reduced graphene oxide(RGO),the tetrahedral needle-like ZnO was successfully obtained by induction heating,and ZnO@RGO composites with different proportions were prepared by simple hydrothermal method.The morphology,size,and phase structure of ZnO@RGO composites were analyzed by SEM,XRD and Raman.And the effects of the mass ratio of ZnO and the paraffin filling amount on the electromagnetic parameters and absorbing properties of ZnO@RGO composites were also discussed.The ZnO@RGO composite with ZnO∶GO mass ratio of 3∶1 has the best wave absorption performance(-44.5 dB;3 mm).Electromagnetic parameters show that the attenuation mechanism of ZnO@RGO composites can be attributed to the conductance loss and polarization effect.ZnO@RGO composites have a low reflection loss value and thin thickness,which has great potential for military stealth.
作者
熊自明
吴凡
张中威
孙慜倩
马超
王涛
XIONG Ziming;WU Fan;ZHANG Zhongwei;SUN Minqian;MA Chao;WANG Tao(State Key Laboratory for Disaster Prevention&Mitigation of Explosion&Impact,Army Engineering University of PLA,Nanjing 210007,China;School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 241000,China;32381 Budui)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2022年第3期1152-1162,共11页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(51708553)。
关键词
四面体针状ZnO
ZnO@RGO复合材料
感应加热
微波吸收
衰减机制
电磁波
tetrahedral needle-like ZnO
ZnO@RGO composites
induction heating
microwave absorption
attenuation mechanism
electromagnetic waves
