Electromagnetic Interference Shielding Properties of (Ni0.5Zn0.5Fe2 O4 /CI/CB) Ternary Composites-Filled Paraffin Wax Matrix

In this work, Ternary composites of NiZn ferrite/carbonyl iron/carbon black (Ni0.5Zn0.5Fe2 O4 /CI/CB) are prepared via two stages: Firstly, Ni0.5Zn0.5Fe2 O4 is prepared using a self-combustion method. After that, the process is continued via mixing CB, CI, and Ni0.5Zn0.5Fe2 O4 through the grinding balls. Three various weight ratios of Ni0.5Zn0.5Fe2 O4 /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 (Ni0.5Zn0.5Fe2 O4 /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 properties are measured in the frequency band of 8.8–12 GHz to investigate microwave characterization. Microwave absorption materials (MAMs) show wide absorption bandwidths and reasonable surface density. The maximum shielding efficiency is 21.7 dB at 11.0 GHz for 4 mm thickness of the F/CI/CB-111 composite sample.