Hinterstein, Manuel ; Schmitt, Ljubomira A. ; Hoelzel, Markus ; Jo, Wook ; Rödel, Jürgen ; Kleebe, Hans-Joachim ; Hoffman, M. (2015):
Cyclic electric field response of morphotropic Bi1/2Na1/2TiO3-BaTiO3 piezoceramics.
In: Applied Physics Letters, 106 (22), pp. 222904-1-222904-5. AIP Publishing, ISSN 0003-6951,
DOI: 10.1063/1.4922145,
[Article]
Abstract
In this study, the evolution of field induced mechanisms in lead-free piezoelectric ceramics (1−x)Bi1/2 Na 1/2TiO3-xBaTiO3 with x = 0.06 and 0.07 was investigated by transmission electron microscopy, neutron, and X-ray diffraction. Preliminary investigations revealed a strong degradation of macroscopic electromechanical properties within the first 100 bipolar electric cycles. Therefore, this structural investigation focuses on a comparative diffraction study of freshly prepared, poled, and fatigued specimens. Transmission electron microscopy and neutron diffraction of the initial specimens reveal the coexistence of a rhombohedral and a tetragonal phase with space group R3c and P4bm, respectively. In situ electric field X-ray diffraction reveals a pronounced field induced phase transition from a pseudocubic state to a phase composition of significantly distorted phases upon poling with an external electric field of 4 kV/mm. Although the structures of the two compositions are pseudocubic and almost indistinguishable in the unpoled virgin state, the electric field response shows significant differences depending on composition. For both compositions, the application of an electric field results in a field induced phase transition in the direction of the minority phase. Electric cycling has an opposite effect on the phase composition and results in a decreased phase fraction of the minority phase in the fatigued remanent state at 0 kV/mm.
| Item Type: | Article |
|---|---|
| Erschienen: | 2015 |
| Creators: | Hinterstein, Manuel ; Schmitt, Ljubomira A. ; Hoelzel, Markus ; Jo, Wook ; Rödel, Jürgen ; Kleebe, Hans-Joachim ; Hoffman, M. |
| Title: | Cyclic electric field response of morphotropic Bi1/2Na1/2TiO3-BaTiO3 piezoceramics |
| Language: | English |
| Abstract: | In this study, the evolution of field induced mechanisms in lead-free piezoelectric ceramics (1−x)Bi1/2 Na 1/2TiO3-xBaTiO3 with x = 0.06 and 0.07 was investigated by transmission electron microscopy, neutron, and X-ray diffraction. Preliminary investigations revealed a strong degradation of macroscopic electromechanical properties within the first 100 bipolar electric cycles. Therefore, this structural investigation focuses on a comparative diffraction study of freshly prepared, poled, and fatigued specimens. Transmission electron microscopy and neutron diffraction of the initial specimens reveal the coexistence of a rhombohedral and a tetragonal phase with space group R3c and P4bm, respectively. In situ electric field X-ray diffraction reveals a pronounced field induced phase transition from a pseudocubic state to a phase composition of significantly distorted phases upon poling with an external electric field of 4 kV/mm. Although the structures of the two compositions are pseudocubic and almost indistinguishable in the unpoled virgin state, the electric field response shows significant differences depending on composition. For both compositions, the application of an electric field results in a field induced phase transition in the direction of the minority phase. Electric cycling has an opposite effect on the phase composition and results in a decreased phase fraction of the minority phase in the fatigued remanent state at 0 kV/mm. |
| Journal or Publication Title: | Applied Physics Letters |
| Volume of the journal: | 106 |
| Issue Number: | 22 |
| Publisher: | AIP Publishing |
| Uncontrolled Keywords: | Piezoelectric fields, Electric fields, X-ray diffraction, Phase transitions, Neutron diffraction |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Earth Science 11 Department of Materials and Earth Sciences > Earth Science > Geo-Material-Science 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials 11 Department of Materials and Earth Sciences > Material Science > Structure Research DFG-Collaborative Research Centres (incl. Transregio) DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres 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 |
| Date Deposited: | 08 Jun 2015 12:38 |
| DOI: | 10.1063/1.4922145 |
| PPN: | |
| Funders: | The research leading to these results has received funding from the BMBF (Bundesministerium fuer Bildung und Forschung) (Grant No. 05K13VK1), the Sonderforschungsbereich 595 “Fatigue in Functional Materials”, and from the Feodor Lynen Research Fellowship Program of the Alexander von Humboldt Foundation. |
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