Effect of Lead substitution On The Microstructural, Magnetic and Dielectric Properties of Barium Hexaferrite Powder

Abstract

M-type hexaferrites with composition Ba1-xPbxFe12O19 (x = 0.0 to 0.4) were prepared using a sol gel auto-combustion technique. The prepared as burnt powder samples were sintered at 950° C for 4 hours in a muffle furnace. The effect of lead substitution of barium hexaferrites on microstructural, magnetic and dielectric properties was investigated. The structural characterization on Ba1-xPbxFe12O19 (x = 0.0 to 0.4) hexaferrite samples were carried out using X-ray diffraction (XRD) technique. The lattice parameters and cell volume of all samples were calculated. The X-ray diffraction patterns at room temperature reveal that the prepared samples have a single phase. Surface morphology and microstructural changes of prepared hexaferrite particles were examined using SEM and XRD. SEM images confirm the formation of hexagonal plate like particle and the addition of Pb increases the formation of plate like structures. The magnetic properties of prepared hexaferrite samples were investigated by using VSM and the dielectric measurements were carried out at room temperature in frequency ranges from 100 Hz to 2MHz.