Study of structural and magnetic properties of Sr-hexaferrites using additives

Abstract

M-type strontium hexaferrites of composition (SrO)1-x (La2O3)x 5.7 Fe2O3, where x = 0.00, 0.04, 0.08 were successfully prepared by standard ceramic technique using magnetite from Cox’s Bazar beach sand. The influence of the composition on both the structural and magnetic properties of M-type Sr-hexaferrites with substitution of Sr2+ by La2O3 of various samples were investigated. The effect of simultaneous addition of CaO and SiO2 on the structural and magnetic properties of the hexaferrites sintered at different temperatures was also studied. The prepared samples were studied by measuring density, X-ray density, porosity, lattice parameters, unit cell volume, Curie temperature and X-ray diffraction (XRD) technique. It has been observed that the structural and magnetic properties of the sintered Sr-hexaferrites increases significantly with the addition of La2O3 ¬ and (CaO + SiO2) and sintering temperature