Abstract
Ta-doped 0.50(Na0.5Bi0.5)TiO3–0.50(K0.5Bi0.5)TiO3 piezoelectric ceramics were synthesized by solid state reaction and the effect of doping concentration on dielectric, ferroelectric and electrical properties were investigated. Ta-doping showed an increase in depolarization (Td) and phase transition (Tm) temperatures; thus increasing its usable temperature range. Ferroelectric properties were also enhanced in terms of increased remnant polarization and better squareness of P–E loop. In conductivity studies, activation energy was calculated and the contribution of grains to polarization mechanism was confirmed through Nyquist plots.
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