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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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Info

Original languageEnglish
Pages1094-1099
Number of pages6
JournalJournal of Materials Science
Journal publication dateJan 2012
Volume47
Issue2
DOIs
StatePublished
Peer-reviewedYes

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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