Electrical properties of calcium modified PZT (52/48) ceramics

• Impedance analysis of Pb1−xCaxZr0.52Ti0.48O3 (0≤x≤0.1) ceramics was reported.
• It shows the existence of temperature dependent electrical relaxation phenomenon.
• The Ca-doped PZT (52/48) ceramics exhibited enhanced dielectric constant.
• The ac conductivity of the present samples obeys Jonscher power law.

To optimize the electrical properties of lead zirconate titanate, it was modified by calcium. Pb1−xCaxZr0.52Ti0.48O3, x=0.00, 0.02, 0.04, 0.06 and 0.10 composition, was prepared by the sol–gel technique. All the samples have been crystallized to a mixture of rhombohedral and tetragonal crystallographic phases. The dielectric constant increases with the increase in calcium concentration due to the increase in electronic polarization. The Curie temperature decreases with increase in calcium concentration of the sample. The ac conductivity of the sample obeys the Jonscher power law. The ac conductivity of the sample increases with the increase in calcium concentration. The impedance study shows the contribution from grain and grain boundary.