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Electric-field-induced phase transformation and frequency-dependent behavior of bismuth sodium titanate-barium titanate

Lee, Kai Yang ; Shi, Xi ; Kumar, Nitish ; Hoffman, Mark ; Etter, Martin ; Checchia, Stefano LU ; Winter, Jens ; da Silva, Lucas Lemos ; Seifert, Daniela and Hinterstein, Manuel (2020) In Materials 13(5).
Abstract

The electric field response of the lead-free solid solution (1-x)Bi0.53Na0.47TiO3-xBaTiO3 (BNT-BT) in the higher BT composition range with x = 0.12 was investigated using in situ synchrotron X-ray powder diffraction. An introduced Bi-excess non-stoichiometry caused an extended morphotropic phase boundary, leading to an unexpected fully reversible relaxor to ferroelectric (R-FE) phase transformation behavior. By varying the field frequency in a broad range from 10-4 up to 102 Hz, BNT-12BT showed a frequency-dependent gradual suppression of the field induced ferroelectric phase transformation in favor of the relaxor state. Afrequency triggered self-heating within the sample... (More)

The electric field response of the lead-free solid solution (1-x)Bi0.53Na0.47TiO3-xBaTiO3 (BNT-BT) in the higher BT composition range with x = 0.12 was investigated using in situ synchrotron X-ray powder diffraction. An introduced Bi-excess non-stoichiometry caused an extended morphotropic phase boundary, leading to an unexpected fully reversible relaxor to ferroelectric (R-FE) phase transformation behavior. By varying the field frequency in a broad range from 10-4 up to 102 Hz, BNT-12BT showed a frequency-dependent gradual suppression of the field induced ferroelectric phase transformation in favor of the relaxor state. Afrequency triggered self-heating within the sample was found and the temperature increase exponentially correlated with the field frequency. The effects of a lowered phase transformation temperature TR-FE, caused by the non-stoichiometric composition, were observed in the experimental setup of the freestanding sample. This frequency-dependent investigation of an R-FE phase transformation is unlike previous macroscopic studies, in which heat dissipating metal contacts are used.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Actuating materials, BNT-BT, Ferroelectrics, Lead-free, Phase transformation, Piezoceramics, Piezoelectricity, Relaxor, Self-heating, X-ray powder diffraction
in
Materials
volume
13
issue
5
article number
1054
publisher
MDPI AG
external identifiers
  • pmid:32120795
  • scopus:85081639120
ISSN
1996-1944
DOI
10.3390/ma13051054
language
English
LU publication?
yes
id
29249796-8ef0-4973-beaf-b28d10cc1285
date added to LUP
2020-04-02 16:24:26
date last changed
2020-09-16 04:43:20
@article{29249796-8ef0-4973-beaf-b28d10cc1285,
  abstract     = {<p>The electric field response of the lead-free solid solution (1-x)Bi<sub>0.53</sub>Na<sub>0.47</sub>TiO<sub>3</sub>-xBaTiO<sub>3</sub> (BNT-BT) in the higher BT composition range with x = 0.12 was investigated using in situ synchrotron X-ray powder diffraction. An introduced Bi-excess non-stoichiometry caused an extended morphotropic phase boundary, leading to an unexpected fully reversible relaxor to ferroelectric (R-FE) phase transformation behavior. By varying the field frequency in a broad range from 10<sup>-4</sup> up to 10<sup>2</sup> Hz, BNT-12BT showed a frequency-dependent gradual suppression of the field induced ferroelectric phase transformation in favor of the relaxor state. Afrequency triggered self-heating within the sample was found and the temperature increase exponentially correlated with the field frequency. The effects of a lowered phase transformation temperature T<sub>R-FE</sub>, caused by the non-stoichiometric composition, were observed in the experimental setup of the freestanding sample. This frequency-dependent investigation of an R-FE phase transformation is unlike previous macroscopic studies, in which heat dissipating metal contacts are used.</p>},
  author       = {Lee, Kai Yang and Shi, Xi and Kumar, Nitish and Hoffman, Mark and Etter, Martin and Checchia, Stefano and Winter, Jens and da Silva, Lucas Lemos and Seifert, Daniela and Hinterstein, Manuel},
  issn         = {1996-1944},
  language     = {eng},
  month        = {02},
  number       = {5},
  publisher    = {MDPI AG},
  series       = {Materials},
  title        = {Electric-field-induced phase transformation and frequency-dependent behavior of bismuth sodium titanate-barium titanate},
  url          = {http://dx.doi.org/10.3390/ma13051054},
  doi          = {10.3390/ma13051054},
  volume       = {13},
  year         = {2020},
}