Ehmke, Matthias ; Glaum, Julia ; Jo, Wook ; Granzow, Torsten ; 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, 94 (8)
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 ; Glaum, Julia ; Jo, Wook ; Granzow, Torsten ; Rödel, Jürgen |
| Type of entry: | Bibliographie |
| Title: | Stabilization of the Fatigue-Resistant Phase by CuO Addition in (Bi1/2Na1/2)TiO3-BaTiO3 |
| Language: | English |
| Date: | August 2011 |
| Journal or Publication Title: | Journal of the American Ceramic Society |
| Volume of the journal: | 94 |
| Issue Number: | 8 |
| URL / URN: | http://dx.doi.org/10.1111/j.1551-2916.2010.04379.x |
| 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. |
| Identification Number: | doi:10.1111/j.1551-2916.2010.04379.x |
| Additional Information: | SFB 595 Cooperation A1, D1 |
| 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 |
| Last Modified: | 05 Mar 2013 09:51 |
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