材料科学
反射损耗
微波食品加热
复合材料
衰减
电介质
空隙(复合材料)
阻抗匹配
介电损耗
吸收(声学)
球体
芯(光纤)
电阻抗
复合数
光电子学
光学
电信
计算机科学
电气工程
工程类
物理
天文
作者
Shuang Wei,Xiaoxia Wang,Baoqin Zhang,Mingxun Yu,Yiwei Zheng,Yao Wang,Jingquan Liu
标识
DOI:10.1016/j.cej.2016.12.005
摘要
To obtain excellent microwave absorption (MA) performance, elaborately designing dielectric-magnetic hierarchical [email protected]2O4@Fe3O4 composites were successfully synthesized by a two-step route. Both the sea urchin-like structure generated by NiCo2O4 and the void space in the core originated from the decomposition of carbon spheres were beneficial structural characteristics for the attenuation of electromagnetic waves. The impedance matching as a result of the addition of uniformly Fe3O4 nanoparticles was a strong contributor to the excellent MA property of [email protected]2O4@Fe3O4 composites. The minimum reflection loss (RL) value of it reached −43.0 dB at 13.4 GHz with a thickness of 3.4 mm, which was much higher than that of [email protected]2O4 or pure NiCo2O4.
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