Synthesis and characterisation of CoFe2O4 + CaCu3Ti4O12composite of ferrite

Abstract

Composite of cobalt ferrite (CoFe2O4) and CCTO are fabricated by chemical route method and its dielectric and structural properties are investigated. The composite powder fired at and above 8000c and have perovskite structure. The composite then formed pellet and sintered at 9000C. It possess of both magnetic as well as dielectric property simultaneously. With X-ray diffraction, the phase transformation is confirmed. By the help of SEM characterization, the surface morphology of composite is confirmed. With EDAX images the percentage of elements in composite is also confirmed.Its dielectric properties have been studied in the temperature range 300-700 K. It is found that dielectric constant (ɛ) increases with increase in temperature.The dielectric loss increases with increase in temperature, irrespective of CCTO transition temperature, that ensures the semiconducting nature or thermally activated mechanism of conduction in the composites.