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

Martin A, Khansur NH, Webber KG (2018)


Publication Status: Published

Publication Type: Journal article

Publication year: 2018

Journal

Publisher: ELSEVIER SCI LTD

Book Volume: 38

Pages Range: 4623-4630

Journal Issue: 14

DOI: 10.1016/j.jeurceramsoc.2018.06.017

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.

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How to cite

APA:

Martin, A., Khansur, N.H., & Webber, K.G. (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://doi.org/10.1016/j.jeurceramsoc.2018.06.017

MLA:

Martin, Alexander, Neamul Hayet Khansur, and Kyle Grant 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.

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