Microwave absorption behavior of (Ni0.5Zn0.5Fe2O4/CI/CB) ternary composites-filled paraffin wax matrix

Abstract In this work, Ternary composites of NiZn ferrite/carbonyl iron/carbon black (Ni0.5Zn0.5Fe2O4/CI/CB) are prepared via two stages: Firstly, Ni0.5Zn0.5Fe2O4 is prepared using a self-combustion method. After that, the process is continued via mixing CB, CI, and Ni0.5Zn0.5Fe2O4 through the grinding balls. Three various weight ratios of Ni0.5Zn0.5Fe2O4/CI/CB (1:1:1, 1:1:2, and 2:1:1) with various thicknesses (2–4–6 mm) are prepared. The absorbers are prepared by dispersing (Ni0.5Zn0.5Fe2O4/CI/CB) composites with a weight ratio of 40% w/w within a paraffin wax matrix. X-ray diffractometry and FTIR spectroscopy are utilized in order to characterize the samples. The morphology of the powders is investigated by SEM. The electromagnetic interference (EMI) shielding and microwave absorption properties are measured in the frequency band of 8.8–12 GHz to investigate the microwave characterization. The microwave absorption materials (MAMs) show wide bandwidths under − 10 dB in the range of 2.8–3.2 GHz and reasonable surface density in the range of 3.62–4.04 kg/m2. The MAM shows a minimal reflection loss of -19.4 dB at the matching frequency of 9.9 GHz for the thickness of 6 mm. The maximum shielding efficiency is 21.7 dB at 11.0 GHz for 4 mm thickness of the F/CI/CB-111 composite sample.