Abstract
The electrical properties of 0.65Pb(Mg1/3Nb2/3)O3-0.35(PbTiO3) ceramics over a wide range of frequencies (102–106 Hz) and temperatures (30–225∘C) were studied using impedance spectroscopy technique. The impedance and electric permittivity were strongly temperature and frequency dependent. The activation energy, calculated from the temperature dependence of AC conductivity of the ceramics was found to be∼0.5 eV. The relaxation process in the ceramics was found to be of non-Debye type. The nature of Cole-Cole diagram reveals the contribution of grain (bulk) and grain boundary permittivity in the ceramics.
Highlights
In the recent years lead perovskite relaxor systems such as Pb(Zn1/3Nb2/3)O3 (PZN) and Pb(Mg1/3Nb2/3)O3 (PMN) have attracted considerable attention due to their exceptionally large dielectric constants and piezoelectric properties [1, 2]
In view of what mentioned above, we have reported the impedance spectroscopy studies of 0.65Pb(Mg1/3Nb2/3)O3-0.35PbTiO3 (PMN-35PT) ceramics to better understand the conduction mechanism of this important ferroelectric composition
The PMN-35PT ceramics studied in the present work was prepared by using columbite method and fine powders obtained from an aqueous solution of oxalic acid (OA) (0.18 mol−1)
Summary
In the recent years lead perovskite relaxor systems such as Pb(Zn1/3Nb2/3)O3 (PZN) and Pb(Mg1/3Nb2/3)O3 (PMN) have attracted considerable attention due to their exceptionally large dielectric constants and piezoelectric properties [1, 2]. These are characterized by site and charge disorder [3]. In view of what mentioned above, we have reported the impedance spectroscopy studies of 0.65Pb(Mg1/3Nb2/3)O3-0.35PbTiO3 (PMN-35PT) ceramics to better understand the conduction mechanism of this important ferroelectric composition
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