材料科学
纳米线
衍射仪
反射损耗
介电损耗
分散性
纳米颗粒
吸收(声学)
制作
微波食品加热
光电子学
透射电子显微镜
微观结构
电介质
矫顽力
同轴
纳米技术
扫描电子显微镜
复合材料
复合数
凝聚态物理
工程类
物理
病理
电气工程
医学
高分子化学
量子力学
替代医学
作者
Caiyun Liang,Chenyu Liu,Huan Wang,Lina Wu,Zhaohua Jiang,Yongjun Xu,Baozhong Shen,Zhijiang Wang
摘要
Controllable dielectric–magnetic coaxial hybrid nanowires, having a core of SiC nanowires and a shell of Fe3O4 nanoparticles, have been synthesized using a straightforward polyol approach. The morphology, microstructure and magnetic properties of the SiC–Fe3O4 hybrid nanowires have been characterized by transmission electron microscope, powder X-ray diffractometer and vibrating sample magnetometer. The characterization confirms that monodisperse Fe3O4 nanoparticles of core size 10 nm have been successfully coated on the surface of SiC nanowires. The coverage density of the nanoparticles may be adjusted simply by changing the weight ratio of the precursors. Measurement of the electromagnetic (EM) parameters indicates that the Fe3O4 nanoparticles increase the magnetic loss and improve the impedance matching conditions compared to untreated SiC nanowires. When the coverage density of Fe3O4 is optimal, the reflection loss of an EM wave can be as low as −51 dB. By changing the loading density of Fe3O4, the best microwave absorption state was obtained in the 2–18 GHz band. These results suggest that SiC–Fe3O4 hybrid nanowires will be valuable in EM absorption applications.
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