Investigation the Radar Absorption Behavior of Polymer Matrix Composites with Doped Barium Hexaferrite Particles

In this paper with the aim of investigating the radar absorption behavior of doped barium hexaferrite¡ composites contain this powder with different weight percent in resin epoxy matrix were prepared. X-ray diffraction analysis (XRD)¡ Vibration sample magnetometer (VSM) and Vector network analysis (VNA) were performed in order to evaluate phase¡ magnetic properties and microwave absorption properties. According to the results¡ barium hexaferrite with negligibility amount of non-magnetic hematite phase were was formed. VSM results¡ representing the reduction of saturation magnetization (Ms) and coercive force (Hc) values in all samples¡ and the lowest value of saturation magnetization (18.14 emu/g) and coercive force (118 Oe) corresponded to the sample that contain tin ion. According to the VNA results¡ the maximum absorption is achieved when 50 wt.% of powder is used in resin matrix which was related to the sample with the composition of BaZn0.6Zr0.3Sn0.3Fe10.8O19 at the frequency of 11.1 GHz with -16.3 dB.