Facile synthesis and microwave absorption properties of double loss Ti₃SiC₂/Co₃Fe₇ powders

In this work, double-loss Ti₃SiC₂/Co₃Fe₇ powders were synthesized by carbothermic reduction method. X-ray diffraction (XRD) confirmed the successful synthesis of the Ti₃SiC₂/Co₃Fe₇ powders, and scanning electron microscope (SEM) images showed the Co₃Fe₇ particles uniformly scattering on the surface of Ti₃SiC₂. Microwave absorption properties of the Ti₃SiC₂/Co₃Fe₇ powders were investigated in the frequency range from 8.2 to 12.4 GHz (X-band). The high dielectric and magnetic loss give rise to a favorable microwave absorption performance. The sample with a thickness of 2.4 mm owns an effective absorption bandwidth (reflection loss below − 10 dB) of 8.8–11.9 GHz, with a minimum value of − 31.2 dB at 10.0 GHz. This study is an important exploration of microwave absorption materials for high temperature application.