Microwave Absorption Behavior of Low Loading Ratio of Ni3+ 0.25Ni2+ 0.375Zn2+ 0.25Fe2 O4 Nanoparticles Coated with Polyaniline Within Paraffin Wax Matrix

Abstract

NiZn ferrite (Ni3+ 0.25Ni2+ 0.375Zn2+ 0.25Fe2 O4 ) is coated with polyaniline (PANI) using an in-situ polymerization technique. Three various weight ratios of PANI/Ni3+ 0.25Ni2+ 0.375Zn2+ 0.25Fe2 O4 (1:1, 2:1, and 3:1) are synthesized. The absorbers are synthesized by introducing PANI/F nanocomposites within a paraffin wax of 25% w/w. X-ray diffractometry, FTIR spectroscopy, UV-vis spectroscopy, TGA analysis and SEM analysis are utilized in order to characterize the samples. The electromagnetic interference (EMI) shielding and microwave absorption (MA) properties are measured in the frequency band of 8.8–12 GHz to investigate the microwave characterization. Minimal reflection loss of -19.8 dB at the matching frequency of 10.8 GHz and the absorption bandwidth under -10 dB of 2.2 GHz for 3.12 mm thickness with a surface density of 3.07 kg/m2 are noticed for the PANI/F.2 nanocomposite sample. The maximum shielding efficiency of 23.18 dB at 11.1 GHz for 2.90 mm thickness is observed for the PANI/F.2 nanocomposite.