Magnetic properties of polymer matrix composites filled with ferrite powders

Abstract

Purpose: The aim of this paper was to present magnetic properties research results of polymer matrix composites. The influence of the kind of fillers and amount of fillers on the magnetic properties of the composites was studied and is presented in this paper. Design/methodology/approach: Epoxy resin filled with three different amounts (15%, 25% and 35%vol.) of filler and three kinds of ferrite powders were prepared by gravitational casting in order to obtain gradient polymer matrix composites. Magnetic properties of polymeric composites were measured by SQUID magnetometer (MPMS XL7 Quantum Design). All measurements were carried out in the temperature 300 K and magnetic field up to 7 T. Findings: The research findings showed that addition of ferrite powders to epoxy resin caused increased values of magnetic remanence. Moreover it was observed that the higher values of remanence were for polymer composites with anisotropic filler than that with isotropic. Research limitations/implications: Presented studies have been limited to the content of 35%vol. of filler because of difficulties with casting of higher filled composites. Higher value of filler content caused dramatic increase of viscosity. Practical implications: Magnetic composites with different content of magnetic filler are still investigated by scientists in order to improve magnetic properties of composite materials, which are used in various industries. Originality/value: Presented results of magnetic properties dependence on content and type of filler of new gradient polymer matrix composites are novel and original.