Synthesis and electromagnetic characteristics of MnFe₂O₄/TiO₂ composite material

Abstract The development of absorbing materials with a wide frequency band is still challenging. Here we successfully fabricated the MnFe2O4/TiO2 composite powder through the micro-emulsion method. We characterized the phase structures, morphologies, particle size, and chemical compositions of MnFe2O4/TiO2 composite powders, and measured the microwave absorption capacity as well. The MnFe2O4/TiO2 composite powders present a coating structure. The microwave absorption test revealed that the maximum microwave loss reaches -38.6 dB at a thickness of 3.05 mm and the corresponding bandwidth is about 4 GHz in the ranges from 7.8 to11.4 GHz. The excellent performance is attributed to the high surface area endowed by the coating structure. This research provided an alternative route for the preparation of high bandwidth electromagnetic wave absorbing materials.