Synthesis and characterization of magnesium doped lead titanate

Abstract

Magnesium (Mg) doped lead titanate powders (PT: Mg) ceramics, with various Mg contents (0, 2.5, 5, 7.5, 10, 12.5, 15, 17.5, 20, and 30 mol%), are prepared by the sol-gel method and characterized by X-Ray diffraction (XRD), scanning electron microscopy (SEM) and Raman spectroscopy. XRD results show that the magnesium diminishes the lattice tetragonality of PT:Mg. The average particle size and morphology were studied by SEM. The investigations done by Raman spectroscopy allow the analyzis of the substitution mechanism behavior related to the Mg incorporation into PT structure. A concentration threshold appears around 10% of Mg corresponding in a change of the compensation process with Mg 2+ ions replacing Pb 2+ions below and both Pb 2+ and Ti 4+ above.

Structurally tuned lead magnesium titanate perovskite as a photoelectrode material for enhanced photoelectrochemical water splitting

“…4a reveal that the prepared samples are crystallized into the perovskite phase without any secondary phase and possess good crystallinity. As summarized in Table S2, the pristine PbTiO 3 and the PMT have the tetragonal phase and the pseudo-cubic structure, respectively, and are in good agreement with those previously reported [65][66][67], which can be also further supported by the presence of well resolved (001)-(100) and (002)-(200) doublets peaks around 2θ of 22-24° and 44-46°, respectively, in the PbTiO 3 perovskites. The two peaks of each doublet overlap, which indicates the development of pseudo-cubic symmetry that can be available for a high Mg concentration [67].…”