Structural, Magnetic and Dielectric Properties of Barium Cobalt Hexaferrite-Powder and Barium Cobalt Hexaferrite-Epoxy Resin Composite Film

Abstract

The W-type barium cobalt hexaferrite powder with chemical composition BaCo2Fe16O27 was prepared using a simple heat treatment method. The precursor was calcinated at 650 °C for 3 h in a muffle furnace and then slowly cooled to room temperature in order to obtain barium cobalt hexaferrite powder. The flexible epoxy thin film of Ba-cobalt hexaferrite/epoxy composite was fabricated using the suitable amount of hardener and curing agent. Surface and morphological studies were carried out using X-ray diffractograms (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron micrography (SEM). The XRD pattern of hexaferrite reveals the formation of mixed phases– M and W. The FTIR spectra of hexaferrite powder samples were recorded at room temperature by using KBr pallet method. The field-dependent magnetic properties of the hexaferrite sample were investigated at room temperature using a vibrating sample magnetometer (VSM) with a maximum applied field of 15 kOe. The dielectric measurements were taken at room temperature within the frequency range to 100 MHz to 2 MHz.