Peculiar properties of phase transitions in Na0.5Bi0.5TiO3-xBaTiO3 (0<x<6) lead-free relaxor ferroelectrics seen via acoustic emission

Eveniy Dul'Kin, Jan Suchanicz, Antoni Kania, Michael Roth

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9 Scopus citations

Abstract

Na0.5Bi0.5TiO3-xBaTiO3 (0<x<6) relaxor ferroelectrics crystals were investigated by means of dielectric and acoustic emission methods. Dielectric curves exhibit the slightly visible small maxima near the depolarization temperatures, Td, and the wide maxima at the temperatures of Tm, whereas the acoustic emission exhibits the sharp bursts, corresponding to Td, Tlm, which is known to be a temperature exhibiting a strong frequency dispersion, TRE, which is known to be a temperature above which a frequency dispersion vanishes, and the Tm and the Tp manifesting a transition to the paraelectric phase. Based on the AE data it was established that all these characteristic temperatures shift down as x increases, but with different slopes. A mechanism of such the differences is discussed.

Original languageAmerican English
Article numbere20170953
JournalMaterials Research
Volume21
Issue number3
DOIs
StatePublished - 2018

Bibliographical note

Publisher Copyright:
© 2018 Universidade Federal de Sao Carlos. All rights reserved.

Keywords

  • Acoustic emission
  • Curie temperature
  • Depolarization temperature
  • Phase transformations
  • Relaxor ferroelectrics

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