Synthesis and characterization of lead lanthanum zirconate titanate (Pb0.95La0.05Zr0.65Ti0.35)O3

Lanthanum doped lead zirconate titanate of composition (Pb0.95La0.05Zr0.65Ti0.35)O3 was prepared by gel entrapment technique (GET). The gel was suitably calcined and the resultant product was characterized by XRD, BET surface area analysis, dynamic light scattering and SEM. X-ray analysis of the powder calcined at 1023 K indicated formation of product free from other phases. Characterization of the powder by XRD line-broadening showed an average particle size of ∼40 nm. SEM study of the pellet sintered at 1173 K showed presence of uniform grains of submicron size. DSC studies indicated that there is an electronic transition at the Curie temperature of 565 K. The dielectric constant of the sample measured as a function of temperature at different frequencies also showed an electronic transition at 543 K.