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Synthesis and characterization of magnesium doped lead titanate
Authors:F. Z. Fadil  T. Lamcharfi  F. Abdi  M. Aillerie
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 mole %), 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 Mg2+ ions replacing Pb2+ ions below and both Pb2+ and Ti4+ above. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Keywords:lead titanate  Mg‐doping  ferroelectrics  synthesis  XRD  Raman  SEM  substitution model
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