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Stabilization of the Fatigue-Resistant Phase by CuO Addition in (Bi1/2Na1/2)TiO3-BaTiO3

Ehmke, Matthias and Glaum, Julia and Jo, Wook and Granzow, Torsten and Rödel, Jürgen (2011):
Stabilization of the Fatigue-Resistant Phase by CuO Addition in (Bi1/2Na1/2)TiO3-BaTiO3.
In: Journal of the American Ceramic Society, p. 2473, 94, (8), ISSN 00027820,
[Online-Edition: http://dx.doi.org/10.1111/j.1551-2916.2010.04379.x],
[Article]

Abstract

Bipolar electric fatigue in the lead-free material 0.94(Bi1/2Na1/2)TiO3–0.06BaTiO3 (BNT-BT) is investigated throughout the first 100 cycles in which a strong degradation of macroscopic electromechanical properties is observed. The addition of 1 mol% CuO successfully stabilizes the fatigue-resistant phase and retains the initial electromechanical properties. In order to explain the underlying mechanisms, two models are proposed: degradation takes place either due to (1) pinning of the domain walls by defect charges or (2) an electric field-induced symmetry change that reduces the amount of rhombohedral phase that dominates the macroscopic properties. This different approach based on symmetry considerations to explain the fatigue behavior has an impact on future fatigue studies that are concerned with novel lead-free materials on the basis of BNT-BT.

Item Type: Article
Erschienen: 2011
Creators: Ehmke, Matthias and Glaum, Julia and Jo, Wook and Granzow, Torsten and Rödel, Jürgen
Title: Stabilization of the Fatigue-Resistant Phase by CuO Addition in (Bi1/2Na1/2)TiO3-BaTiO3
Language: English
Abstract:

Bipolar electric fatigue in the lead-free material 0.94(Bi1/2Na1/2)TiO3–0.06BaTiO3 (BNT-BT) is investigated throughout the first 100 cycles in which a strong degradation of macroscopic electromechanical properties is observed. The addition of 1 mol% CuO successfully stabilizes the fatigue-resistant phase and retains the initial electromechanical properties. In order to explain the underlying mechanisms, two models are proposed: degradation takes place either due to (1) pinning of the domain walls by defect charges or (2) an electric field-induced symmetry change that reduces the amount of rhombohedral phase that dominates the macroscopic properties. This different approach based on symmetry considerations to explain the fatigue behavior has an impact on future fatigue studies that are concerned with novel lead-free materials on the basis of BNT-BT.

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 94
Number: 8
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
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue
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 > 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 > D - Component properties > Subproject D1: Mesoscopic and macroscopic fatigue in doped ferroelectric ceramics
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > D - Component properties
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 15 Aug 2011 07:45
Official URL: http://dx.doi.org/10.1111/j.1551-2916.2010.04379.x
Additional Information:

SFB 595 Cooperation A1, D1

Identification Number: doi:10.1111/j.1551-2916.2010.04379.x
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