Chin. Phys. B ›› 2013, Vol. 22 ›› Issue (12): 128101-128101.doi: 10.1088/1674-1056/22/12/128101

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

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

王文杰, 臧充光, 焦清介   

  1. State Key Laboratory of Explosive Science and Technology, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
  • 收稿日期:2013-06-06 修回日期:2013-08-06 出版日期:2013-10-25 发布日期:2013-10-25
  • 基金资助:
    Project supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20121101110014).

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

Wang Wen-Jie (王文杰), Zang Chong-Guang (臧充光), Jiao Qing-Jie (焦清介)   

  1. State Key Laboratory of Explosive Science and Technology, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
  • Received:2013-06-06 Revised:2013-08-06 Online:2013-10-25 Published:2013-10-25
  • Contact: Zang Chong-Guang E-mail:zangchongguang@bit.edu.cn
  • Supported by:
    Project supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20121101110014).

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摘要： Magnesium-substituted Mn0.8Zn0.2Fe2O4 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).

关键词: ferrite, composite material, microwave absorber

Abstract: Magnesium-substituted Mn0.8Zn0.2Fe2O4 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).

Key words: ferrite, composite material, microwave absorber

中图分类号:  (New materials: theory, design, and fabrication)

  • 81.05.Zx
72.80.Tm (Composite materials) 77.55.fj (Niobate- and tantalate-based films)