Complex permittivity of FeSiAl/Al₂O₃ ceramic composite at X-band frequencies

¹ Laboratory of Electronic Systems, Information Processing, Mechanics and Energy, Faculty of Sciences, Ibn Tofail University, Kenetra, Morocco
² Materials and Instrumentations group, Superior School of Technology, Moulay Ismail University, Meknes, Morocco

^* Corresponding author: ouhassan.youssef@gmail.com

Abstract

The objective of this paper is to extract and study the complex permittivity of the FeSiAl/Al₂O₃ ceramic composite at X-band frequencies. We studied by simulation the complex permittivity of four composites with FeSiAl content varying from 0% to 15% by volume in the alumina matrix. The influence of the FeSiAl content on the complex permittivity of the FeSiAl / Al₂O₃ composite was also studied. The results obtained show on the one hand that the complex permittivity depends on the frequency. Indeed, the values of the real and imaginary parts of the complex permittivity decrease with the increase in frequency over the entire frequency range in the X band. On the other hand, the high FeSiAl content has a significant impact on the values of the real and imaginary parts of complex permittivity. Higher values were obtained for composites with a high inclusion content. In this work, we obtained a good agreement between the simulation results and the published experimental results. These results indicate that the FeSiAl / Al₂O₃ composite can be used in applications as an electromagnetic wave absorbing material.