Abstract

Ba doped PLZT ceramic compositions with formula Pb0.982-zLa 0.012Δ0.006-zBaz(Zr0.55Ti 0045)O3 for 2 = 0 to 6 mole% are synthesized by mixed-oxide method. Powder XRD studies indicate the coexistence of rhombohedral and tetragonal phase in 5 mole% Ba doped PLZT composition. SEM pictures show grain size control as Ba concentration increases in PLZT system. εrt and tan 6 are increased up to 4 mole% and 5 mole% Ba doped PLZT composition respectively. Dielectric maximum (εTC) is decreased to 4 mole% Ba doped PLZT and Curie temperature (TC) is decreased with increase of Ba concentration in PLZT system. Coercive field (Ec) has shown gradual enhancement over series. Remanent (P r) and spontaneous (Ps) polarizations are decreased to 5 mole% Ba doped PLZT composition.