Designed synthesis of wide range microwave absorption Fe3O4–carbon sphere composite
Designed synthesis of wide range microwave absorption Fe3O4–carbon sphere composite
复制标题
DOI：
10.1016/j.jallcom.2009.09.065
复制
发表时间：
2010-01
影响因子：
6.2
通讯作者：
Shibing Ni;Xinghui Wang;G. Zhou;Fengchun Yang;Junming Wang;D. He
中科院分区：
文献类型：
--
作者：
Shibing Ni;Xinghui Wang;G. Zhou;Fengchun Yang;Junming Wang;D. He
采用简单的水热法合成了 Fe3O4-碳球复合材料。通过场发射扫描电子显微镜（FE-SEM）、能量色散谱（EDS）、X射线衍射（XRD）、振动样品磁力计（VSM）和拉曼光谱对合成产物进行了表征。采用矢量网络分析方法测量了不同体积分数的石蜡和Fe3O4-碳球复合材料的复介电常数和磁导率。由于介电和磁的双重损耗，实现了较宽的微波吸收区域。当匹配厚度为4mm时，计算得出的Fe3O4-碳球复合材料体积分数为70%的样品的反射损耗在2.5~18GHz范围内表现出宽广的微波吸收。
Fe3O4–carbon sphere composite was synthesized by a simple hydrothermal method. The as-synthesized products were characterized by field-emission scanning electron microscopy (FE-SEM), energy dispersive spectrum (EDS), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), and Raman spectrum. The complex permittivity and permeability of paraffin wax and Fe3O4–carbon sphere composite with different volume fraction of the composite were measured by vector network analysis. A wide region of microwave absorption was achieved due to dual dielectric and magnetic losses. When the matching thickness is 4mm, the calculated reflection loss of the sample with 70% volume fraction of Fe3O4–carbon sphere composite exhibits a broad microwave absorption ranging from 2.5 to 18GHz.