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Lead-free electrostrictive bismuth perovskite ceramics with thermally stable field-induced strains

Tran, Vu Diem Ngoc and Han, Hyoung-Su and Yoon, Chang-Ho and Lee, Jae-Shin and Jo, Wook and Rödel, Jürgen (2011):
Lead-free electrostrictive bismuth perovskite ceramics with thermally stable field-induced strains.
In: Materials Letters, pp. 2607-2609, 65, (17-18), ISSN 0167577X, [Online-Edition: http://dx.doi.org/10.1016/j.matlet.2011.05.059],
[Article]

Abstract

Electric field-induced strain (EFIS) properties of Bi1/2(Na0.82K0.18)1/2TiO3 (BNKT) ceramics modified with Sr(K1/4Nb3/4)O3 (SKN) have been investigated as functions of composition and temperature. BNKT ceramics near a phase boundary revealed the coexistence of ferroelectric rhombohedral and tetragonal phases, resulting in a typical ferroelectric butterfly-shaped bipolar S–E loop at room temperature, whose normalized strain (Smax/Emax) showed a significant temperature coefficient of 0.38 pm/V/K. However, 5 mol% SKN-modified BNKT ceramics revealed a typical electrostrictive behaviour with a thermally stable electrostrictive coefficient, Q33 = 0.021 m4/C2, which is almost comparable to that of Pb(Mg1/3Nb2/3)O3 (PMN) ceramics that have been dominantly used as Pb-based electrostrictive materials over the last decades.

Item Type: Article
Erschienen: 2011
Creators: Tran, Vu Diem Ngoc and Han, Hyoung-Su and Yoon, Chang-Ho and Lee, Jae-Shin and Jo, Wook and Rödel, Jürgen
Title: Lead-free electrostrictive bismuth perovskite ceramics with thermally stable field-induced strains
Language: English
Abstract:

Electric field-induced strain (EFIS) properties of Bi1/2(Na0.82K0.18)1/2TiO3 (BNKT) ceramics modified with Sr(K1/4Nb3/4)O3 (SKN) have been investigated as functions of composition and temperature. BNKT ceramics near a phase boundary revealed the coexistence of ferroelectric rhombohedral and tetragonal phases, resulting in a typical ferroelectric butterfly-shaped bipolar S–E loop at room temperature, whose normalized strain (Smax/Emax) showed a significant temperature coefficient of 0.38 pm/V/K. However, 5 mol% SKN-modified BNKT ceramics revealed a typical electrostrictive behaviour with a thermally stable electrostrictive coefficient, Q33 = 0.021 m4/C2, which is almost comparable to that of Pb(Mg1/3Nb2/3)O3 (PMN) ceramics that have been dominantly used as Pb-based electrostrictive materials over the last decades.

Journal or Publication Title: Materials Letters
Volume: 65
Number: 17-18
Uncontrolled Keywords: Piezoelectric materials; Perovskites; Ferroelectrics; Ceramics
Divisions: 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
11 Department of Materials and Earth Sciences > Material Science
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
11 Department of Materials and Earth Sciences
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 05 Jul 2011 13:30
Official URL: http://dx.doi.org/10.1016/j.matlet.2011.05.059
Additional Information:

SFB 595 A1

Identification Number: doi:10.1016/j.matlet.2011.05.059
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