Impedance and a.c. conductivity studies on Ba(Nd0.2Ti 0.6Nb0.2)O3 ceramic prepared through conventional and microwave sintering route

Abstract

Electrical conduction studies on Ba(Nd0.2Ti0.6Nb 0.2)O3 ceramic samples prepared through conventional and microwave sintering route are presented In this paper. D.C. and a.c. conductivities of these samples as a function of temperature from 300-900 K have been studied. Two types of conduction processes are evident from the frequency dependant conductivity plots, I.e. low-frequency conduction due to short-range hopping and high-frequency conduction due to the localized relaxation (reorientational) hopping mechanism. Grain and grain boundary contributions to the conductivity In these samples are obtained from Impedance/admittance measurements via equivalent circuit modelling. © Indian Academy of Sciences.