反射损耗
复合数
多孔性
无定形固体
无定形碳
碳纤维
材料科学
纳米颗粒
环氧树脂
吸收(声学)
化学
复合材料
纳米技术
结晶学
作者
Nannan Wu,Chang Liu,Dongmei Xu,Jiurong Liu,Wei Liu,Qian Shao,Zhanhu Guo
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2018-08-02
卷期号:6 (9): 12471-12480
被引量:316
标识
DOI:10.1021/acssuschemeng.8b03097
摘要
Magnetite (Fe3O4)/carbon (C) composite flowers with an average size of 4–6 μm were prepared through a facile route including a solvothermal approach and a carbon reduction process. The resultant Fe3O4/C composites are porous and exhibit a three-dimensional (3D) flower-like morphology with the core–shell Fe3O4@C nanoparticles hybridized by amorphous carbon sheets. The epoxy resin composites containing 50 wt % 3D porous Fe3O4/C composite flowers display an optimal reflection loss (RL) value of −54.6 dB at 5.7 GHz at a thin thickness of 4.27 mm and the effective bandwidth with RL < −10 dB reaches 6.0 GHz at a thickness of 2.1 mm. These enhanced EM wave absorption performances are attributed to the synergistic effects of Fe3O4 and carbon as well as the structural advantages, e.g., three-dimensional structure with large surface area, porous and core–shell structures of Fe3O4/C flowers. These results suggest the 3D porous Fe3O4/C composite flowers designed here can serve as ideal candidates for high-performance EM wave absorption.
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