Enhanced and broadband microwave absorption of flake-shaped Fe and FeNi composite with Ba ferrites

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• 作者：Wangchang Li^a ; Junjun Lv^b ; ^{LyuJunJun@caep.cn} ; Xiang Zhou^a ; Jingwu Zheng^a ; Yao Ying^a ; Liang Qiao^a ; Jing Yu^a ; Shenglei Che^a ; ^{cheshenglei@zjut.edu.cn}
• 关键词：Microwave absorbing materials ; M-type ferrite ; Flaked FeNi mixture ; Mechanical ball milling
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：2017
• 出版时间：15 March 2017
• 年：2017
• 卷：426
• 期：Complete
• 页码：504-509
• 全文大小：1061 K
• 卷排序：426

文摘

In order to achieve a broad bandwidth absorber at high frequency, the composites of M-type ferrite with flaked carbonyl iron powdersand Fe50Ni50 were prepared to optimize the surface impedance. The complex permeability and permittivity show that the addition of BaM obviously reduces the real part of permittivity and imaginary part of the permeability enhancing the matched-wave-impedance. The structure, morphology and electromagnetic properties are studied in detail. The optimized properties are ascribed to the strength of dipolar polarization and high frequency magnetic resonance.