Writers: Margarete S. Silva, Guilhermina F. Teixeira, Gustavo F. Cavenago, Lucas L. Silva, Rafael G. Dias, Maria A. Zaghete, Mário Cilense, Elson Longo, Alberto A. Cavalheiro
Keywords: PZT; Ba-doped; Electrical properties
Abstract: Lead zirconate titanate, with Zr/Ti ratio of 53/47 was prepared by the polymeric precursor method. It was investigated the barium (II) modification at 0.0, 0.2, 0.4 and 0.6 mol% in substitution to the lead (II) cation in A site of perovskite structure. The powder samples were characterized by XRD and the diffraction patterns were used to Rietveld refinement. The percentages of tetragonal and rhombohedral phases and a systematic study of the effect of barium (II) on the morphology and the dielectric properties of PZT were carried out. The results showed that the tetragonal phase is favored and the ceramic density is improved with the barium (II) insertion. The Curie temperature (Tc) is increased besides the slight reduction of dielectric constant (Kc).
