Microwave Absorbing Properties of MnAlTi Magnetic powder

Microwave Absorbing Properties of MnAlTi Magnetic powder

Yu He^1,a, Shun-kang Pan^1,b, Jia-liang Luo^1,c, Zhen-zhong Wang^1,d, Jun-qing Chang^1,e

(¹School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004,China)

^a1263820702@qq.com, ^bskpan@163.com, ^c553159548@qq.com, ^d543222355@qq.com, ^e1446729492@qq.com

Keywords: MnAlTi alloy, Magnetic material, Microstructure, Electromagnetic parameters, Reflectivity

Abstract. AlMnTi powder were prepared by the process of vacuum levitation melting and high-energy ball milling, the effect of the Ti content on microwave absorbing properties of MnAl powder was investigated by an vector network analyzer. The results show that the powders consist of Al₈Mn₅ single phase with different Ti content; the dielectric loss and the magnetic loss increases with the addition of Ti, the resonant frequency and absorption peak of ε″ and μ″ moves towards lower frequency region simultaneously. The (Al₈Mn₅)₉₄Ti₆ exhibits preferably comprehensive microwave absorbing properties in the range of 4-18 GHz. The value of the minimum reflectivity and absorption peak frequency with the coating thickness of 2.2 mm, are -28.5 dB, 10.7 GHz respectively.
   Microwave Absorbing Properties of MnAlTi Magnetic powder.pdf