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

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Martin A, Khansur NH, Webber K
Zeitschrift: Journal of the European Ceramic Society
Verlag: ELSEVIER SCI LTD
Jahr der Veröffentlichung: 2018
Band: 38
Heftnummer: 14
Seitenbereich: 4623-4630
ISSN: 0955-2219


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-Autoren / FAU-Herausgeber

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


Zitierweisen

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: 

Zuletzt aktualisiert 2019-05-01 um 02:10