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ZnS nanowall coated Ni composites: facile preparation and enhanced electromagnetic wave absorption

机译:ZnS纳米壁涂覆的Ni复合材料:简便的制备方法和增强的电磁波吸收

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摘要

In this work, core-shell composites with Ni cores and ZnS nanowall shells have been successfully prepared by a hydrothermal deposition method. The crystal structures, microstructures and electromagnetic (EM) properties of the samples were investigated by X-ray diffraction, scanning electron microscopy, energy disperse X-ray spectrometry, transmission electron microscopy and a network analyser (2-18 GHz). In comparison with Ni and ZnS particles, the Ni/ZnS composites show the best microwave absorption properties. The optimal reflection loss is -25.78 dB at 14.24 GHz with the thickness of 2.7 mm. The reflection loss below -10 dB (90% microwave absorption) is 4.72 GHz (11.52-16.24 GHz) with only a thickness of 2.7 mm. The enhanced microwave absorption capabilities of Ni/ZnS composites were due to good electromagnetic impedance matching, interfacial relaxation and unique wall-like ZnS shells.
机译:在这项工作中,通过水热沉积法成功地制备了具有Ni核和ZnS纳米壁壳的核-壳复合材料。通过X射线衍射,扫描电子显微镜,能量分散X射线光谱,透射电子显微镜和网络分析仪(2-18 GHz)研究了样品的晶体结构,微结构和电磁(EM)特性。与Ni和ZnS颗粒相比,Ni / ZnS复合材料显示出最佳的微波吸收性能。最佳反射损耗在14.24 GHz时为-25.78 dB,厚度为2.7 mm。低于-10 dB(90%的微波吸收)的反射损耗为4​​.72 GHz(11.52-16.24 GHz),厚度仅为2.7 mm。 Ni / ZnS复合材料的增强的微波吸收能力归因于良好的电磁阻抗匹配,界面弛豫和独特的壁状ZnS壳层。

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