Journal of Inorganic Materials

• Research Paper • Previous Articles     Next Articles

Preparation and Microwave Absorbing Properties of Multi-layered Radar(Microwave) Absorbing Materials Composites

HE Yan-Fei, GONG Rong-Zhou, LI Xiang-Cheng, WANG Xian, HE Hua-Hui   

  1. Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2005-12-07 Revised:2006-02-21 Online:2006-11-20 Published:2006-11-20
  • Contact: HE Yan-Fei

Abstract: Based on the electromagnetic wave propagation laws, a three-layered sheet radar (microwave) absorbing system with the impedance-graded structure was designed. The surface layer, composed of TiO2, easily realizes matching to the free space and protection from destroying. The last layer, made up of magnetic micropowder (MMP) ballmilled from Fe, Co, etc, has significant absorbing effects. The medium layer, comprised of MMP and carbon fibers, forms the impedance-graded structure from the surface to the last layer. The results of experimental measurement show that reflectivity for the three-layer absorber is below --8dB in the frequency range of (8--18)GHz. Tensile strength is 10.8MPa, and peeling strength is 75.2N/cm, satisfying the use of engineering.

Key words: impedance matching, MMP, reflectivity, tensile strength

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