Abstract
Polycrystalline ceramics with composition 0.6BiFeO3-0.4 K0.5Bi0.5TiO3 + 2.5 mol.% MnO2 has been successfully prepared by using solid-state reaction technique. The effect of sintering temperature and dwell time on the microstructural, magnetic, and dielectric properties were comprehensively investigated. The XPS analysis shows that the oxygen vacancy concentration increases with the rise in sintering temperature as well as dwell time. In addition to this, an increase in sintering temperature also leads to a significant rise in the grain size along with a substantial reduction in the porosity of the material. The sample sintered at 980 °C for 3 h shows an enhancement in magnetic properties, which is mainly attributed to the occurrence of a higher concentration of oxygen vacancies in this sample. The sample sintered at 980 °C with 6 h dwell time exhibit an oxygen vacancy concentration of 23.79% and shows a significant improvement in dielectric properties.
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