Electric-field-induced phase transformation and frequency-dependent behavior of bismuth sodium titanate-barium titanate
(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.
(Less)
- author
- 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
- organization
- publishing date
- 2020-02-27
- 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
- 2024-07-24 15:54:06
@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}}, keywords = {{Actuating materials; BNT-BT; Ferroelectrics; Lead-free; Phase transformation; Piezoceramics; Piezoelectricity; Relaxor; Self-heating; X-ray powder diffraction}}, 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}}, }