Effect of ferroelectric long-range order on the unipolar and bipolar electric fatigue in Bi½Na½TiO3 - based lead-free piezoceramics
Effect of ferroelectric long-range order on the unipolar and bipolar electric fatigue in Bi½Na½TiO3 - based lead-free piezoceramics
The fatigue behavior of the lead-free piezoelectric Bi½Na½TiO3–BaTiO3-K½Na½NbO3 (BNT-BT-KNN) under bipolar and unipolar electrical loading is investigated. Special attention is paid to the effect of a decreasing ferroelectric order which was affected by an increase in KNN-content. It is found that, in mainly ferroelectric systems with low KNN-content, bipolar cycling leads to domain wall pinning and formation of microcracks, while in mainly non-ferroelectric systems with high KNN-content fatigue can be rationalized by the repeated field-induced phase transition occurring during each field cycle. Under unipolar load, fatigue in low-KNN systems is dominated by domain wall pinning and the formation of a space charge field. Only the latter effect is present in non-ferroelectric high-KNN systems, which fatigue to a smaller degree.
3927-3933
Luo, Zhenhua
eb242e50-a73e-474f-809f-4924cfed68c2
Granzow, Torsten
486c274b-3225-4a2c-89c6-205859b84800
Glaum, Julia
9ae13470-db2e-41b6-a2ba-59a0b7bd5cae
Jo, Wook
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Rödel, Jürgen
4d7e6f34-ad9d-4b94-aea6-3ab7126fd751
Hoffman, Mark
1d549729-a5d6-4241-a467-cac304447980
November 2011
Luo, Zhenhua
eb242e50-a73e-474f-809f-4924cfed68c2
Granzow, Torsten
486c274b-3225-4a2c-89c6-205859b84800
Glaum, Julia
9ae13470-db2e-41b6-a2ba-59a0b7bd5cae
Jo, Wook
57bc0b19-5993-4484-a30d-935e9874b05c
Rödel, Jürgen
4d7e6f34-ad9d-4b94-aea6-3ab7126fd751
Hoffman, Mark
1d549729-a5d6-4241-a467-cac304447980
Luo, Zhenhua, Granzow, Torsten, Glaum, Julia, Jo, Wook, Rödel, Jürgen and Hoffman, Mark
(2011)
Effect of ferroelectric long-range order on the unipolar and bipolar electric fatigue in Bi½Na½TiO3 - based lead-free piezoceramics.
Journal of the American Ceramic Society, 94 (11), .
(doi:10.1111/j.1551-2916.2011.04605.x).
Abstract
The fatigue behavior of the lead-free piezoelectric Bi½Na½TiO3–BaTiO3-K½Na½NbO3 (BNT-BT-KNN) under bipolar and unipolar electrical loading is investigated. Special attention is paid to the effect of a decreasing ferroelectric order which was affected by an increase in KNN-content. It is found that, in mainly ferroelectric systems with low KNN-content, bipolar cycling leads to domain wall pinning and formation of microcracks, while in mainly non-ferroelectric systems with high KNN-content fatigue can be rationalized by the repeated field-induced phase transition occurring during each field cycle. Under unipolar load, fatigue in low-KNN systems is dominated by domain wall pinning and the formation of a space charge field. Only the latter effect is present in non-ferroelectric high-KNN systems, which fatigue to a smaller degree.
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Effect of ferroelectric long-range order on the unipolar and bipolar electric fatigue in Bi12Na12TiO3 – based lead-free piezoceramics.pdf
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Published date: November 2011
Organisations:
Electronics & Computer Science
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Local EPrints ID: 364508
URI: http://eprints.soton.ac.uk/id/eprint/364508
ISSN: 0002-7820
PURE UUID: b642ae3e-6055-4309-8a7d-7590a7a43045
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Date deposited: 02 May 2014 09:32
Last modified: 14 Mar 2024 16:37
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Author:
Zhenhua Luo
Author:
Torsten Granzow
Author:
Julia Glaum
Author:
Wook Jo
Author:
Jürgen Rödel
Author:
Mark Hoffman
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