Microwave absorption properties of core double-shell FeCo/C/BaTiO3 nanocomposites

被引：222
作者：
Jiang, Jingjing [1 ,2 ]
Li, Da [1 ,2 ]
Geng, Dianyu [1 ,2 ]
An, Jing [3 ]
He, Jun [3 ]
Liu, Wei [1 ,2 ]
Zhang, Zhidong [1 ,2 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
[2] Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China
[3] Cent Iron & Steel Res Inst, Div Funct Mat, Beijing 100081, Peoples R China
来源：
NANOSCALE | 2014年 / 6卷 / 08期
基金：
中国国家自然科学基金;
关键词：
COMPLEX PERMITTIVITY; COMPOSITES; RESIN;
D O I：
10.1039/c3nr04087a
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Microwave absorption properties of core double-shell FeCo/C/(x) BaTiO3 nanocomposites were investigated in the 1-18 GHz frequency range. High resolution transmission electron microscopy studies reveal the core double-shell type nanocomposite with FeCo nanoparticles as the center, while carbon and BaTiO3 are the inside and the outside shells, respectively. Enhanced relative permittivity made the core double-shell FeCo/C/(x) BaTiO3 nanocomposites with better electromagnetic impedance matching than that of a FeCo/C and BaTiO3 mixture. Reflection loss (RL) values of FeCo/C/(20 wt%) BaTiO3-paraffin composite are almost double those of the FeCo/C-paraffin composite at the absorbent thickness from 2 to 7.5 mm due to enhanced interfacial effects. The RL value of the FeCo/C/(20 wt%) BaTiO3-paraffin composite is -41.7 dB at 11.3 GHz at the absorbent thickness of 2 mm and a broad absorption bandwidth of 5.1 GHz (RL values exceeding -10 dB) covers the 9.4-14.5 GHz frequency range.
引用
收藏
页码：3967 / 3971
页数：5
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