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Origin of the large strain response in (K[sub 0.5]Na[sub 0.5])NbO[sub 3]-modified (Bi[sub 0.5]Na[sub 0.5])TiO[sub 3]–BaTiO[sub 3] lead-free piezoceramics

Jo, Wook ; Granzow, Torsten ; Aulbach, Emil ; Rödel, Jürgen ; Damjanovic, Dragan (2009)
Origin of the large strain response in (K[sub 0.5]Na[sub 0.5])NbO[sub 3]-modified (Bi[sub 0.5]Na[sub 0.5])TiO[sub 3]–BaTiO[sub 3] lead-free piezoceramics.
In: Journal of Applied Physics, 105 (9)
doi: 10.1063/1.3121203
Article, Bibliographie

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Abstract

The mechanism of the giant unipolar strain recently observed in a lead-free piezoceramic, 0.92(Bi0.5Na0.5)TiO3−0.06BaTiO3−0.02(K0.5Na0.5)NbO3 [ S.-T. Zhang, A. B. Kounga, E. Aulbach, H. Ehrenberg, and J. Rödel, Appl. Phys. Lett. 91, 112906 (2007) was investigated. The validity of the previously proposed mechanism that the high strain comes both from a significant volume change during the field-induced phase transition, from an antiferroelectric to a ferroelectric phase and the domain contribution from the induced ferroelectric phase was examined. Monitoring the volume changes from the simultaneously measured longitudinal and transverse strains on disk-shaped samples showed that the phase transition in this specific material does not involve any notable volume change, which indicates that there is little contribution from a volume change due to the phase transition to the total strain response. Temperature dependent hysteresis measurements on unpoled samples of a nearby ferroelectric composition, 0.93(Bi0.5Na0.5)TiO3−0.06BaTiO3−0.01(K0.5Na0.5)NbO3 demonstrated that the origin of the large strain is due to the presence of a nonpolar phase that brings the system back to its unpoled state once the applied electric field is removed, which leads to a large unipolar strain.

Item Type: Article
Erschienen: 2009
Creators: Jo, Wook ; Granzow, Torsten ; Aulbach, Emil ; Rödel, Jürgen ; Damjanovic, Dragan
Type of entry: Bibliographie
Title: Origin of the large strain response in (K[sub 0.5]Na[sub 0.5])NbO[sub 3]-modified (Bi[sub 0.5]Na[sub 0.5])TiO[sub 3]–BaTiO[sub 3] lead-free piezoceramics
Language: English
Date: May 2009
Journal or Publication Title: Journal of Applied Physics
Volume of the journal: 105
Issue Number: 9
DOI: 10.1063/1.3121203
Abstract:

The mechanism of the giant unipolar strain recently observed in a lead-free piezoceramic, 0.92(Bi0.5Na0.5)TiO3−0.06BaTiO3−0.02(K0.5Na0.5)NbO3 [ S.-T. Zhang, A. B. Kounga, E. Aulbach, H. Ehrenberg, and J. Rödel, Appl. Phys. Lett. 91, 112906 (2007) was investigated. The validity of the previously proposed mechanism that the high strain comes both from a significant volume change during the field-induced phase transition, from an antiferroelectric to a ferroelectric phase and the domain contribution from the induced ferroelectric phase was examined. Monitoring the volume changes from the simultaneously measured longitudinal and transverse strains on disk-shaped samples showed that the phase transition in this specific material does not involve any notable volume change, which indicates that there is little contribution from a volume change due to the phase transition to the total strain response. Temperature dependent hysteresis measurements on unpoled samples of a nearby ferroelectric composition, 0.93(Bi0.5Na0.5)TiO3−0.06BaTiO3−0.01(K0.5Na0.5)NbO3 demonstrated that the origin of the large strain is due to the presence of a nonpolar phase that brings the system back to its unpoled state once the applied electric field is removed, which leads to a large unipolar strain.

Uncontrolled Keywords: barium compounds, bismuth compounds, dielectric hysteresis, electric domains, ferroelectric materials, ferroelectric transitions, piezoceramics, potassium compounds, sodium compounds
Additional Information:

SFB 595 A1

Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > A - Synthesis > Subproject A1: Manufacturing of ceramic, textured actuators with high strain
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > A - Synthesis
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 15 Jun 2011 08:16
Last Modified: 05 Mar 2013 09:48
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