为了研究 Fe3 O 4形貌与其复合材料电磁吸收性能之间的关系,采用水热法制备了微粒和棒状两种形貌的 Fe3 O 4与石墨烯复合材料.利用 X 射线衍射(XRD)仪、透射电子显微镜(TEM)和矢量网络分析仪(VNA)对复合材料的结构、形貌以及电磁吸收性能进行了表征.结果表明,纳米 Fe3 O 4棒/石墨烯复合材料相比纳米 Fe3 O 4粒子/石墨烯具有更优异的电磁吸收性能,其在8~18 GHz 范围内小于－10 dB 频带宽9．8~17．9 GHz,说明材料的微波吸收性能和纳米粒子的形貌有关.
In order to study the relationship between the morphologies of Fe3 O 4 and the microwave absorption properties of its composites,Fe3 O 4 nanoparticles/graphene and Fe3 O 4 nanorod/graphene composites were pre-pared by hydrothermal method.The structure,morphology and microwave absorption properties of the com-posites were characterized by XRD,TEM and vector network analysis (VNA).The results indicated that the Fe3 O 4 nanorod/graphene composites had better microwave absorption ability than the Fe3 O 4 nanoparticles/gra-phene composites.The microwave absorption of Fe3 O 4 nanorod/graohene values less than -10 dB was in the ranges of 9.8-17.9 GHz,proving the microwave absorption performance greatly depends on the shape of nano-particles.
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