Structure and ferroelectric behaviour of Na0.5Bi0.5TiO3-KNbO3 ceramics
In: Advances in Applied Ceramics Advances in Applied Ceramics, Maney Publishing, 2016, 115 (2), pp.89-95. ⟨10.1080/17436753.2015.1104053⟩ Wang, G, Hall, D A, Daniel, L, Comyn, T P & Kleppe, A K 2016, ' Structure and ferroelectric behaviour of Na0.5Bi0.5TiO3-KNbO3 ceramics ', Advances in Applied Ceramics (Online), vol. 115, no. 2, pp. 89-95 https://doi.org/10.1080/17436753.2015.1104053 Advances in Applied Ceramics, 2016, 115 (2), pp.89-95. ⟨10.1080/17436753.2015.1104053⟩; (2016-02-01) S. 89-95
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Zugriff:
International audience; Lead-free piezoelectric ceramics, (1−x)Na0.5Bi0.5TiO3-xKNbO3 (NBT-xKN), with x = 0.02–0.08 were fabricated by solid-state reaction and sintering. The crystal structures and dielectric properties were measured for different KN contents. All compositions in the unpoled, as-sintered state were found to be single-phase pseudo-cubic. However, typical ferroelectric behaviour, with well-saturated polarisation-electric field hysteresis loops, was observed for certain compositions at high electric field levels. It is shown using high-energy synchrotron X-ray diffraction that the application of the electric field induced an irreversible structural transformation from the nano-polar pseudo-cubic phase to a ferroelectric rhombohedral phase. The changes in lattice elastic strain and crystallographic texture of a poled NBT-0.02KN specimen as a function of the grain orientation, ψ, conform well to those expected for a conventional rhombohedrally distorted perovskite ferroelectric ceramic. The dielectric permittivity-temperature relationships for all compositions exhibit two transition temperatures and a frequency-dependent behaviour that is typical of a relaxor ferroelectric. The transition temperatures and grain size decrease with the increasing KN content.
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Structure and ferroelectric behaviour of Na0.5Bi0.5TiO3-KNbO3 ceramics
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Autor/in / Beteiligte Person: | Hall, David A. ; Kleppe, Annette K. ; Comyn, Tim P. ; Wang, Gang ; Daniel, Laurent ; School of Materials [Manchester] ; University of Manchester [Manchester] ; University of Leeds ; Laboratoire Génie électrique et électronique de Paris (GeePs) ; Centre National de la Recherche Scientifique (CNRS)-CentraleSupélec-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris-Sud - Paris 11 (UP11) ; DIAMOND Light source ; Université Paris-Sud - Paris 11 (UP11)-Université Pierre et Marie Curie - Paris 6 (UPMC)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS) |
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Quelle: | Advances in Applied Ceramics Advances in Applied Ceramics, Maney Publishing, 2016, 115 (2), pp.89-95. ⟨10.1080/17436753.2015.1104053⟩ Wang, G, Hall, D A, Daniel, L, Comyn, T P & Kleppe, A K 2016, ' Structure and ferroelectric behaviour of Na0.5Bi0.5TiO3-KNbO3 ceramics ', Advances in Applied Ceramics (Online), vol. 115, no. 2, pp. 89-95 https://doi.org/10.1080/17436753.2015.1104053 Advances in Applied Ceramics, 2016, 115 (2), pp.89-95. ⟨10.1080/17436753.2015.1104053⟩; (2016-02-01) S. 89-95 |
Veröffentlichung: | Maney Publishing, London, 2016 |
Medientyp: | unknown |
ISSN: | 1743-6753 (print) ; 1743-6761 (print) |
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