Preparation and Microwave Absorption Properties of the Fe/TiO2/Al2O3 Composites

被引：7

作者：

Li, Yun ^{[1
]}

Cheng, Haifeng ^{[1
]}

Wang, Nannan ^{[1
]}

Zhou, Shen ^{[1
]}

Xie, Dongjin ^{[1
]}

Li, Tingting ^{[1
]}

机构：

[1] Natl Univ Def Technol, Sci & Technol Adv Ceram Fibers & Composites Key L, Changsha 410073, Hunan, Peoples R China

来源：

NANO | 2018年 / 13卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Fe/TiO2/Al2O3; composites; transmission/reflection waveguide method; interfacial polarization; eddy current effect; microwave absorption property; ABSORBING PROPERTIES; PARTICLE-SIZE; CARBONYL IRON; FE NANOWIRES; ALLOY; NANOCOMPOSITES; POLARIZATION; STRATEGY;

D O I：

10.1142/S1793292018501254

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

To reduce the imbalance of impedance matching between the magnetic metal nanowires and free space, Fe/TiO2 core/shell nanowire arrays with different diameters were fabricated in the templates of anodic aluminum oxide membranes by electrodeposition. The influences of the microstructure on the microwave absorption properties of the Fe/TiO2/Al2O3 composites were studied by the transmission/reflection waveguide method. It was demonstrated experimentally that both the interfacial polarization and the diameter of the Fe/TiO2 core/shell nanowires have critical effects on the microwave absorption properties. We also investigated the angle dependence of the microwave absorption properties. Due to the interfacial polarization and associated relaxation, the Fe/TiO2/Al2O3 composites exhibited optimal microwave absorption properties when microwave propagation direction was accordant with the axis of the nanowires. Finally, we managed to obtain an optimal reflection loss of below -10 dB (90% absorption) over 10.2-14.8 GHz, with a thickness of 3.0 mm and the minimum value of -39.4 dB at 11.7 GHz.

引用

页数：12

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