Fabrication and performance optimization of Mn–Zn ferrite/EP composites as microwave absorbing materials

doi:10.1088/1674-1056/22/12/128101

Abstract Magnesium-substituted Mn_0.8Zn_0.2Fe₂O₄ ferrite is synthesized by the sol–gel combustion method using citrate acid as the complex agent. The electromagnetic absorbing behaviors of ferrite/polymer coatings fabricated by dispersing Mn–Zn ferrite into epoxy resin (EP) are studied. The microstructure and morphology are characterized by X-ray diffraction and scanning electron microscope. Complex permittivity, complex permeability, and reflection loss of ferrite/EP composite coating are investigated in a low frequency range. It is found that the prepared ferrite particles are traditional cubic spinel ferrite particles with an average size of 200 nm. The results reveal that the electromagnetic microwave absorbing properties are significantly influenced by the weight ratio of ferrite to polymer. The composites with a weight ratio of ferrite/polymer being 3:20 have a maximum reflection loss of –16 dB and wide absorbing band. Thus, the Mn–Zn ferrite is the potential candidate in electromagnetic absorbing application in the low frequency range (10 MHz–1 GHz).

Keywords: ferrite composite material microwave absorber

Received: 06 June 2013
Revised: 06 August 2013
Accepted manuscript online:

PACS:	81.05.Zx	(New materials: theory, design, and fabrication)
	72.80.Tm	(Composite materials)
	77.55.fj	(Niobate- and tantalate-based films)

Fund: Project supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20121101110014).

Corresponding Authors: Zang Chong-Guang
E-mail: zangchongguang@bit.edu.cn

Cite this article:

Wang Wen-Jie (王文杰), Zang Chong-Guang (臧充光), Jiao Qing-Jie (焦清介) Fabrication and performance optimization of Mn–Zn ferrite/EP composites as microwave absorbing materials 2013 Chin. Phys. B 22 128101

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Fabrication and performance optimization of Mn–Zn ferrite/EP composites as microwave absorbing materials

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