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

页码：3967 / 3971

页数：5

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