Elaboration par voie sol-gel et caracterisation de materiaux ceramiques PbTiO3 dopes au lanthane

Abstract Preparation and characterization of sol-gel derived La-doped PbTiO 3 ceramics. La-doped lead titanate bulk powders of perovskite type were prepared by a sol gel process. An excess of lead (5%) was added in order to compensate the Pb losses during the annealing process. The effect of temperature on the evolution of the powders was studied using Fourier Transform Infrared (FTIR) spectroscopy, Thermal Gravimetric Analysis (TGA), Differential Thermal Analysis (DTA) and X-Ray Diffraction (XRD). The effect of La-doping concentration on the crystal structure was also investigated. The La-doped lead titanate bulk powders (PLT) annealed at 600°C for 2h crystallize in a perovskite phase with cubic structure.