Electric field-induced changes in the ferroelastic behavior of (Na1/2Bi1/2)TiO3-BaTiO3

Journal article


Publication Details

Author(s): Martin A, Khansur NH, Webber K
Journal: Journal of the European Ceramic Society
Publisher: ELSEVIER SCI LTD
Publication year: 2018
Volume: 38
Journal issue: 14
Pages range: 4623-4630
ISSN: 0955-2219
eISSN: 1873-619X


Abstract

In this study, the macroscopic mechanical behavior was characterized for poled and unpoled polycrystalline (1-x)(Na1/2Bi1/2)TiO3-xBaTiO(3) (NBT-xBT) for compositions across the morphotropic phase boundary (MPB). Due to a field-induced ferroelectric phase transformation, NBT-xBT compositions near the MPB (x = 6-7 mol%) showed a significant decrease in the coercive stress for electrically poled samples. The apparent difference in mechanical behavior is suggested to be due to an irreversible electric-field-induced transformation to long-range ferroelectric order in the poled samples. The results indicate a significant difference in the critical stresses for the relaxor-ferroelectric transition and ferroelastic domain wall motion, which can have important effects on applications for lead-free ferroelectrics. To further illustrate this, a method was developed to electrically depole NBT-xBT at room temperature, resulting in an unpoled NBT-xBT material with long-range ferroelectric order. Mechanical testing revealed analogous macroscopic ferroelastic behavior to the poled samples, despite the lack of a piezoelectric response.


FAU Authors / FAU Editors

Khansur, Neamul Hayet Dr.
Lehrstuhl für Werkstoffwissenschaften (Glas und Keramik)
Martin, Alexander Dr.
Lehrstuhl für Werkstoffwissenschaften (Glas und Keramik)
Webber, Kyle Prof.
Professur für Werkstoffwissenschaften (Funktionskeramik)


How to cite

APA:
Martin, A., Khansur, N.H., & Webber, K. (2018). Electric field-induced changes in the ferroelastic behavior of (Na1/2Bi1/2)TiO3-BaTiO3. Journal of the European Ceramic Society, 38(14), 4623-4630. https://dx.doi.org/10.1016/j.jeurceramsoc.2018.06.017

MLA:
Martin, Alexander, Neamul Hayet Khansur, and Kyle Webber. "Electric field-induced changes in the ferroelastic behavior of (Na1/2Bi1/2)TiO3-BaTiO3." Journal of the European Ceramic Society 38.14 (2018): 4623-4630.

BibTeX: 

Last updated on 2019-06-08 at 09:06