Improvement of microwave absorbing capability on the soft magnetic/hard magnetic/perovskite composites

Abstract This paper reports an increase in the ability to absorb microwaves from a composite made of combination between soft and hard magnetic materials, perovskite material, and an epoxy as matrix of composite, Ni 0.5 Zn 0.5 Fe 2 O 4 /Ba 0.6 Sr 0.4 Fe 9.5 Al 0.5 MnTiO 19 /FeTiO 3 /epoxy (NBFE) with a wt% ratio of 5:3:2:10. Composite samples were made using the mechanical alloying method with milling techniques and sintered at a temperature of 1000 °C for 5 h. NBFE composites were studied to increase the ability to absorb microwaves at 2–18 GHz frequencies with thickness variations of 1 mm and 2 mm. The results obtained, the composite sample Ni 0.5 Zn 0.5 Fe 2 O 4 /Ba 0.6 Sr 0.4 Fe 9.5 Al 0.5 MnTiO 19 /FeTiO 3 /epoxy has the ability to absorb microwaves with the best reflection loss value −37.47 dB with a bandwidth almost reaches 11.32 GHz in the 2–18 GHz frequency range.