Influence of conductivity on BaTiO3 crystals phase transitions: A dilatometric study

Evgeniy Dul'kin, Igor' Raevski

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


The 3m ⇔ mm2 ⇔ 4mm ⇔ m3m phase transitions in BaTiO3 etched dielectric and non-etched semiconducting crystals have been studied by the dilatometry and the acoustic emission simultaneously. In contrast to ceramics the dilatometric curves in the crystals studied have the form of the dosed hysteresis loops. The hysteresis loop area = temperature hysteresis × thermal expansion coefficient is shown to be a useful parameter for characterizing the phase transition. The differences in the hysteris loop areas between dielectric and semiconducting crystals are likely to be attributed to the additional energy expenditure on phase transition in defect surface layers present on the non-etched semiconducting crystals.

Original languageAmerican English
Pages (from-to)381-387
Number of pages7
Issue number1-4
StatePublished - 2000
Externally publishedYes


  • Acoustic emission
  • Dilatations
  • Dilatometric hysteresis loop thermal expansion coefficient
  • Phase transition


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