Core/shell/shell-structured nickel/carbon/polyaniline nanocapsules with large absorbing bandwidth and absorber thickness range

被引：25

作者：

Liu, Xianguo ^{[1
]}

Or, Siu Wing ^{[1
]}

Leung, Chung Ming ^{[1
]}

Ho, S. L. ^{[1
]}

机构：

[1] Hong Kong Polytech Univ, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2014年 / 115卷 / 17期

关键词：

MICROWAVE-ABSORPTION PROPERTIES; NI NANOCAPSULES; BAND;

D O I：

10.1063/1.4861581

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Core/shell/shell-structured nickel/carbon/polyaniline nanocapsules are prepared by a modified arc-discharge method and a chemical polymerization method, and their microwave absorbing properties are evaluated in the 2-18GHz range covering the full S-Ku bands of microwaves. The bandwidth-broadening effect in various core/shell/shell material phases of the nanocapsules leads to Debye-type multidielectric polarizations in complex permittivity, a broad magnetic natural resonance of 2-8GHz in complex permeability as well as extended absorbing bandwidth and absorber thickness range. A 3mm-thick paraffin-bonded nanocapsule absorber shows an optimal reflection loss (RL) of -9.3 dB at 6.2GHz with an extremely broad -5 dB-bandwidth of 3.4-18GHz in almost the whole S-Ku bands as well as a very large absorber thickness range of down to 1mm without deteriorating RL by 10%. (C) 2014 AIP Publishing LLC.

引用

页数：3