Synthesis and Microwave Absorption Properties of (Ni0.5Zn0.5Fe2O4/CI/CB) Ternary Composites

Abstract

In this work, ternary composites of NiZn ferrite/carbonyl iron/carbon black (Ni0.5Zn0.5Fe2O4/CI/CB) were prepared via two stages. Firstly, Ni0.5Zn0.5Fe2O4 was prepared by a self-combustion method using sucrose as a fuel. After that, the operation was continued via mixing CB, CI, and Ni0.5Zn0.5Fe2O4 through 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) were prepared. The absorbers were prepared by dispersing (Ni0.5Zn0.5Fe2O4/CI/CB) composites with a weight ratio within a paraffin wax matrix of 40 % w/w. X-ray diffractometry and FTIR spectroscopy were used in order to characterize the samples. The morphology of the powders was investigated by SEM. The functional characterization was accomplished by measuring the microwave absorption properties in the frequency band of 8.8–12 GHz. The microwave absorption materials (MAMs) showed wide bandwidths under –10 dB in the range of 2.81–3.20 GHz and reasonable surface density in the range of 3.625–4.041 kg/m2. The absorber of 3.20 GHz bandwidth had a minimal reflection loss of –19.4 dB at the matching frequency of 9.92 GHz with a thickness of 6 mm.