Dielectric response of ZrO2–CeO2 nanocrystalline solid solution above room temperature

Abstract Here we report the dielectric response of partially stabilized zirconia above room temperature. The conductivity increases with rise in temperature and frequency, obeying a power law type nature. The frequency exponent study shows that the Correlated Barrier Hopping model governs the conductivity process. The value of dielectric permittivity increases with increase in milling hour. It is observed that both free charge and space charge conductivities increase as the temperature increases. The complex dielectric permittivity is found to be increased with increase in temperature and decrease with frequency. Complex impedance study shows the grain boundary resistance is higher than the grain resistance. The current density-electric field characteristics show that the Poole Frenkel Emission model is the best suited model for the prepared samples and the trap height varies non-linearly with temperature.