Enhanced microwave absorption in Ni/polyaniline nanocomposites by dual dielectric relaxations

被引：338

作者：

Dong, X. L. ^{[1
,2
]}

Zhang, X. F. ^{[1
,2
]}

Huang, H. ^{[1
,2
]}

Zuo, F. ^{[1
,2
]}

机构：

[1] Dalian Univ Technol, Sch Mat Sci & Engn, Dalian 116024, Peoples R China

[2] Dalian Univ Technol, State Key Lab Mat Modificat Laser Iron & Elect Be, Dalian 116024, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 01期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2830995

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Ni/polyaniline (PANi) nanocomposites were prepared by chemical polymerization, and electromagnetic characteristics were then studied at 2-18 GHz. The permittivity of the Ni/PANi nanocomposite presents dual dielectric relaxations with increasing content of PANi to over 15.6 wt %, which is ascribed to a cooperative consequence of the core/shell interfaces and the dielectric PANi shells. Additionally, the permeability presents a strong natural resonance around 2-8 GHz, which is dominant among microwave magnetic loss. The proper matching of the permittivity and the permeability contributes to enhanced microwave absorption. (c) 2008 American Institute of Physics.

引用

页数：3

共 13 条

[1] Complex permittivity and microwave absorption properties of BaTiO3-polyaniline composite [J].