Wang, D. orcid.org/0000-0001-6957-2494, Khesro, A., Murakami, S. et al. (3 more authors) (2017) Temperature dependent, large electromechanical strain in Nd-doped BiFeO3-BaTiO3 lead-free ceramics. Journal of the European Ceramic Society, 37 (4). pp. 1857-1860. ISSN 0955-2219
Abstract
Lead-free piezoceramics with the composition 0.7(Bi1-xNdx)FeO3-0.3BaTiO3+0.1 wt% MnO2 (BNxF-BT) were prepared using a conventional solid state route. X-ray diffraction and temperature dependent permittivity measurements indicated a transition from a composition lying at a morphotropic phase boundary (MPB) to a pseudocubic phase as a function of Nd concentration. The highest maximum strain (Smax ∼ 0.2% at 60 kV/cm) and effective piezoelectric coefficient (d33* = 333 pm/V) were obtained at room temperature for the composition BN0.02F-BT. The decrease in remanent polarization (Pr) and Berlincourt d33 with increase in Nd concentration can be attributed to the coexistence of ferroelectric and relaxor phases. In-situ polarisation and strain measurements revealed an increase in Pr and d33* with temperature and a reduction in the coercive field EC. Presumably this behavior is due to a combination of thermally activated domain wall motion and lowering of the activation energy for a field induced relaxor-ferroelectric transition, as the Curie maximum is approached.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 Published by Elsevier Ltd. Open Access funded by Engineering and Physical Sciences Research Council. Under a Creative Commons license (https://creativecommons.org/licenses/by/4.0/) |
Keywords: | BiFeO3-BaTiO3; Ferroelectrics; Relaxors; Piezoelectricity; Strain |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) |
Funding Information: | Funder Grant number ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL (EPSRC) EP/L017563/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 11 Jan 2017 11:58 |
Last Modified: | 29 Jan 2018 11:00 |
Published Version: | https://doi.org/10.1016/j.jeurceramsoc.2016.10.027 |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | 10.1016/j.jeurceramsoc.2016.10.027 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:110336 |