FERRITE-POLYMER NANOCOMPOSITES: STRUCTURAL, ELECTRICAL, MAGNETIC AND EMI SHIELDING PROPERTIES

Abstract

Utilizing polyaniline (PANI) filler inside of a ferrite (NiCuZnFe2O4) matrix, electromagnetic absorbent materials that blend organic and inorganic components have been successfully created. These NiCuZn ferrite-PANI nanocomposites were created by mechanically milling ferrite. X-ray diffraction (XRD), Fourier infrared spectroscopy (FTIR), and scanning electron microscopy were used to examine the structural and morphological features of these nanocomposites (SEM). The X-band (8.2-12.4 GHz) and Ku band (12-18 GHz) frequency ranges' electromagnetic characteristics and absorption patterns were investigated. The results show that for nanocomposites, the values of the real (ε′) and imaginary permittivity (ε″) and imaginary permeability (µ″) increase, while the value of real permeability (µ′) decreases as the filler content increases. The morphology, conductivity, and microwave absorption characteristics of the final materials are strongly influenced by parameters such as the amount and particle size of PANI and NCZ. It was shown that the addition of PANI increases overall shielding efficacy as well as reflection loss (RL) (SEtot). The nanocomposite that has the maximum RL, -41.72 dB, has 50% PANI by weight. The higher magnetic and dielectric losses brought on by the incorporation of conductive PANI filler inside the ferrite matrix are what are responsible for these nanocomposites' enhanced electromagnetic absorption capacities. For the creation of high-performance microwave-absorbing and electromagnetic shielding materials, the ability to manipulate the electromagnetic characteristics of these composite materials offers considerable potential.