Abstract
ABSTRACTThe polycrystalline BaBi2Nb2O9 and Ba(Bi0.9Sm0.1)2Nb2O9 ceramics have been fabricated via the molten salt synthesis route. The temperature dependence of dielectric and electrical conductivity properties of BBN and BBSmN ceramics investigated at various frequencies have revealed the characteristic features of relaxor behaviour. The incorporation of Sm3+ for Bi3+ has induced a downward shift in the dielectric maximum temperature (165°C–120°C) with the decrease in dielectric constant maximum (372 – 212) at 100 kHz. The estimated degree of diffuseness (γ) was found to be 2.17 for BBN and 1.93 for BBSmN ceramic samples. The activation energy obtained from the Arrhenius plot revealed the existence of motion of oxygen ion vacancy in these ceramics.
Published Version
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