Defect chemistry of nano-grained barium titanate films

Jon F. Ihlefeld, Mark D. Losego, Ramòn Collazo, William J. Borland, Jon Paul Maria

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Polycrystalline barium titanate thin films have been prepared with 100 ppm of B-site acceptor dopants Ca, Mg, and Mn via chemical solution deposition on base metal substrates. The films are fired in low pO2 atmospheres at 900 °C to prevent substrate oxidation. All dopant species produce low loss, space-charge free material without secondary reoxidation anneals. We note that the dopant concentrations required to compensate for oxygen non-stoichiometry are substantially greater than expected by equilibrium thermodynamic calculations. This observation is rationalized in the context of a composite oxygen defect model with differing reduction enthalpies for grain interiors and surfaces.

Original languageEnglish (US)
Pages (from-to)38-42
Number of pages5
JournalJournal of Materials Science
Volume43
Issue number1
DOIs
StatePublished - Jan 2008

All Science Journal Classification (ASJC) codes

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

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