Phase Transition, Dielectric and Piezoelectric Properties of Perovskite (Pb1-XBax) ZrO3 Ceramics

(Pb_1-xBa_x)ZrO₃ ceramics for the composition range 0 were prepared by the mixed oxide solid state reaction method with calcination temperature at 1000°C for 1 h and sintering temperature at 1300°C for 3 h. Structural phase and dielectric properties were studied. It was found that the density of the ceramics decreased with increasing amounts of Ba²⁺, while the average gain size is in the range at 1 – 2.3 µm. The structure of as-calcined powder revealed that, the fraction of the orthorhombic phase decreased with increasing Ba²⁺ content. The dielectric measurement showed that the AFE-FE and FE-PE phase transformation temperatures decreased with increasing Ba²⁺ concentration. The AFE-FE phase transformation was observed for compositions . The maximum dielectric constant gradually increases with increasing of compositions x up to 0.20. For higher Ba²⁺ concentration, the lowering of maximum dielectric values was accomplished by progressive broadening of the permittivity peak. The d₃₃ values of the samples increased from ~ 0 to 87 pC/N with increasing Ba²⁺ concentration from x = 0.000 to 0.300.

Keywords: (Pb_1-xBa_x)ZrO₃, Structural Phase, Phase Transformation, Dielectric Prperties.

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