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Incorporation of lanthanide ions in lead titanate

Incorporation of lanthanide ions in lead titanate

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Authors

  • A. Pelaiz-Barranco
  • Y. Mendez-Gonzalez
  • D. C. Arnold
  • P. Saint-Gregoire
  • D. J. Keeble

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Original languageEnglish
Pages1094-1099
Number of pages6
JournalJournal of Materials Science
Journal publication dateJan 2012
Journal number2
Volume47
DOIs
StatePublished

Abstract

Lanthanide ion doping of lead titanate was investigated using structural and differential scanning calorimetry measurements. Dense ceramics samples were prepared with starting compositions, Pb(1-3x/2)Ln (x) TiO3, assuming A-site substitution of Ln = La, Nd, Sm, Eu, Gd and Dy, at 2 and 8 at.%. Doping with La3+ reduced the tetragonality and cell volume. A systematic recovery in these values was observed for the smaller Ln(3+) ions, suggesting the onset of partial substitution of the Ln ions at the B-site. The ferroelectric-paraelectric transition temperatures also recovered, consistent with an increased probability of B-site occupation with decreasing ion size. Evidence for site occupancy obtained from the presence cation vacancies is also discussed.

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