Investigation on the electromagnetic wave absorption properties of Ni chains synthesized by a facile solvothermal method
Investigation on the electromagnetic wave absorption properties of Ni chains synthesized by a facile solvothermal method
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简易溶剂热法合成镍链的电磁波吸收性能研究
DOI：
10.1016/j.apsusc.2014.04.029
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发表时间：
2014-07
影响因子：
6.7
通讯作者：
Rui Zhang
中科院分区：
文献类型：
--
作者：
Binbin Wang;Xiaoxuan Pian;Wen Li;Rui Zhang
用溶剂热法成功地制备了一维镍链。采用X射线衍射（XRD）、场发射扫描电子显微镜（FE-SEM）、X射线能谱（EDS）、傅里叶变换红外（FT-IR）、热重和差热分析（TG-DTA）等手段对产物进行了表征。研究了NaOH浓度、溶剂、反应时间等因素对Ni样品形貌的影响。实验结果表明，乙二醇（EG）与水的体积比和NaOH的量对新型镍链的形成起着关键作用。基于随时间变化的实验，提出了链状镍的可能形成机制。测量的电磁参数表明，通过调整厚度为0.8 - 1.0 mm，在13.7 - 18.0 GHz的高频范围内，反射损耗（RL）小于-10 dB的吸收带宽可达4.3 GHz。在17.2 GHz下观察到的最小RL值为− 19.9 dB，厚度为0.8 mm。优异的电磁吸收主要来自介电损耗而不是磁损耗。
One-dimension Ni chains have been successfully prepared by a facile solvothermal method. The as-prepared products were characterized by X-ray diffraction (XRD), field emission scanning electron microscope (FE–SEM), energy dispersive X-ray spectroscopy (EDS), Fourier transform infrared (FT-IR), thermogravimetric and differential thermal analysis (TG–DTA). The effects of the concentration of NaOH, solvent, reaction time on the morphologies of Ni samples were investigated. The experimental results showed that the volume ratios of ethylene glycol (EG) to water and the amounts of NaOH played critical roles in the formation of novel Ni chains. A probable formation mechanism of the chain-like Ni was proposed based on time-dependent experiments. The measured electromagnetic parameters showed that the absorption bandwidth with reflection loss (RL) less than −10 dB was up to 4.3 GHz in the high frequency range of 13.7–18.0 GHz by adjusting the thickness of 0.8–1.0 mm. A minimum RL value of −19.9 dB was observed at 17.2 GHz with a thickness of 0.8 mm. The excellent electromagnetic absorption mostly arises from dielectric loss rather than magnetic loss.
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