On short range ordering in the perovskite lead magnesium niobate

A. D. Hilton, D. J. Barber, C. A. Randall, T. R. Shrout

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Abstract

The structural ordering characteristics of lead magnesium niobate (PMN) and solid solutions (PMN-PT) of PMN with lead titanate have been investigated using transmission electron microscopy (TEM). It is proposed that short range, non-stoichiometric 1:1 ordering of the Mg and Nb cations on an F-centred superlattice generates space charges which dominate the kinetics of the ordering process and inhibit the development of long-range order. Furthermore, it is demonstrated that by introducing off-valent La3+ ions on to the A-site sublattice, the local charges can be at least partially-compensated and an increase in the extent of structural ordering is consequently observed.

Original languageEnglish (US)
Pages (from-to)3461-3466
Number of pages6
JournalJournal of Materials Science
Volume25
Issue number8
DOIs
StatePublished - Aug 1 1990

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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