期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 3, 期 41, 页码 10862-10869出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5tc02063h
关键词
-
资金
- National Natural Science Foundation of China [51172213]
A novel urchin-like ZnS/Ni3S2@Ni composite with a core-shell structure was successfully synthesized by a facile two-stage method. The structure and morphology were investigated by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and energy dispersive spectrometry. The influence of reaction temperature on the structure and morphology of the ZnS/Ni3S2@Ni products was investigated by the aid of XRD and SEM techniques. A plausible formation mechanism for the core-shell urchin-like architectures was proposed based on temperature dependent experiments. Electromagnetic absorption measurements show that the urchin-like ZnS/Ni3S2@Ni composite possesses outstanding electromagnetic absorption properties compared with other ZnS/Ni3S2@Ni composites. The optimal reflection loss of -27.6 dB can be observed at 5.2 GHz and the effective absorption (below -10 dB, 90% electromagnetic absorption) bandwidth is 2.5 GHz (12.2-14.7 GHz) with a thickness of only 1.0 mm. The location of the minimum reflection loss can be tuned between 4.6 GHz and 18.0 GHz for the absorber by tuning the thickness between 0.8-2.5 mm. The enhanced electromagnetic absorption properties were attributed to a synergistic effect between dielectric loss and magnetic loss, multiple interfacial polarization resulting from the heterogeneous structure of the core-shell ternary ZnS/Ni3S2@Ni composite, good impedance matching and a unique urchin-like structure.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据