Broadband and thin microwave absorber of nickel-zinc ferrite/carbonyl iron composite

被引：38

作者：

Yan, Longgang ^{[1
]}

Wang, Jianbo ^{[1
]}

Ye, Yunzhe ^{[1
]}

Hao, Zhi ^{[1
]}

Liu, Qingfang ^{[1
]}

Li, Fashen ^{[1
]}

机构：

[1] Lanzhou Univ, Inst Appl Magnet, Minist Educ, Key Lab Magnetism & Magnet Mat, Lanzhou 730000, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 487卷 / 1-2期

关键词：

Composite materials; Mechanical alloying; Scanning electron microscopy; Magnetic measurements; ZR ALLOY FLAKES; ELECTROMAGNETIC CHARACTERISTICS; MICROSTRUCTURE; PERMEABILITY; NANOCAPSULES;

D O I：

10.1016/j.jallcom.2009.08.051

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ni0.5Zn0.5Fe2O4/carbonyl iron composites for broadband and thin microwave absorbers were prepared from the starting materials of Ni0.5Zn0.5Fe2O4 and raw commercial carbonyl iron by a simple ball-milling technique. Flake-shaped particles are obtained after 2 h ball-milling, and the sample shows the highest permeability among all samples. Permeability and permittivity decrease gradually with increasing ball-milling time. Good microwave absorption properties can be obtained in the samples with ball-milling time 6 and 8 h. Their reflection loss values less than -20 dB in the ranges of 5.4-14.8 and 5.0-13.3 GHz over absorber thicknesses of 1.6-3.3 and 1.7-3.6 mm, respectively. The results can be qualitatively explained by a proper electromagnetic impedance match that is mainly due to the decrease of permittivity with increasing ball-milling time. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：708 / 711

页数：4

共 29 条

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