Evolvement of dielectric relaxation of barium stannate titanate ceramics

In barium stannate titanate (BTS) ceramics, low frequency dielectric relaxation was observed at temperatures far below room temperature. Curve fitting of the temperature dependence of dielectric constant was done according to empirical equations. Several models were employed to study the thermal activated relaxation. The inflexions of frequency difference of dielectric permittivity were compared with the phase transition region for the various compositions of barium stannate titanate ceramics. (C) 2004 Elsevier Ltd and Techna Group S.r.l. All rights reserved.