Effect of Copper Oxide on Dielectric and Magnetic Properties of Substituted Sr-M Hexaferrite

Effect of CuO addition on the hexagoal ferrite (SrCo1.3Ti1.3Fe9.4O12-d) has been investigated. (Co-Ti-Sr)- M hexaferrite compositions were synthesized by sol-gel auto combustion method. Pure ferrite phase was achieved after cacination at 1200°C. However the addition of copper oxide resulted in decomposition of hexagonal ferrite phase into CoFe2O4 phase. In case of 1.5 weight % CuO added specimen, the material was composed of cobalt ferrite and CuO based phases. Densification study shows that bulk density increases with increase of CuO as well as grain size also increases. Permittivity of the ferrites increases with increase in CuO addition and it was highest in 1.5 weight% CuO containing sample. This is due to formation of cubic ferrite phase