Oxygen vacancy related conduction behavior in BaZr0.05Ti0.95O3 ceramic

Abstract

Abstract For this study, the microcrystalline powder of BaZr0.05Ti0.95O3 (BZT) was prepared by the conventional solid state reaction method. The sample was calcined at 1200 °C for 4 hours and sintered at 1300 °C. The calcined powder was structurally characterized by X-ray diffraction (XRD), which showed that the specimen has a Perovskite structure having orthorhombic structure. On analyzing the scanning electron microscope (SEM) the calculated crystal size was observed to range between 20-30 μm. The dielectric study of BZT showed normal phase transition behavior. The conductivity studies as a function of temperature and frequency has been performed to study the role of oxygen vacancies. The results of the frequency dependence of the conductivity suggest that oxygen vacancy hopping processes, due to relaxations in oxygen vacancy-related dipoles, being mainly responsible for the conduction behavior in the studied system.