Abstract
Lead titanate PbTiO3 nanopowders have been synthesized using organic acid precursors method. Effects of synthesis conditions namely, annealing temperature (500-1000 degrees C), annealing time (1-2 h) and type of organic acid (oxalic, tartaric, and citric acids) on the phase formation, morphology and dielectric properties were studied. The produced lead titanate powders were investigated using X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and impedance analyzer. The results obtained showed that pure single tetragonal PbTiO3 phase was obtained for thermally treated precursors at 600 degrees C with annealing time 1, 1.5 and 2 h using oxalic, tartaric and citric acids, respectively. The crystallite size of the pure PbTiO3 was in the range between 28.3 to 32 nm. SEM and TEM micrographs showed that the organic acid types have significant change in the morphology of the produced lead titanate powder. The dielectric properties were increased using organic precursor method compared by the powders obtained by other methods. The high dielectric constant values are excellent for using in embedded capacitor applications.