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Evolving morphotropic phase boundary in lead-free (Bi[sub 1/2]Na[sub 1/2])TiO[sub 3]–BaTiO[sub 3] piezoceramics

Jo, Wook ; Daniels, John E. ; Jones, Jacob L. ; Tan, Xiaoli ; Thomas, Pamela A. ; Damjanovic, Dragan ; Rödel, Jürgen :
Evolving morphotropic phase boundary in lead-free (Bi[sub 1/2]Na[sub 1/2])TiO[sub 3]–BaTiO[sub 3] piezoceramics.
[Online-Edition: http://dx.doi.org/10.1063/1.3530737]
In: Journal of Applied Physics, 109 (1) 014110-1-014110-7. ISSN 00218979
[Artikel], (2011)

Dies ist die neueste Version dieses Eintrags.

Offizielle URL: http://dx.doi.org/10.1063/1.3530737

Kurzbeschreibung (Abstract)

The correlation between structure and electrical properties of lead-free (1−x)(Bi1/2Na1/2)TiO3–xBaTiO3 (BNT-100xBT) polycrystalline piezoceramics was investigated systematically by in situ synchrotron diffraction technique, combined with electrical property characterization. It was found that the morphotropic phase boundary (MPB) between a rhombohedral and a tetragonal phase evolved into a morphotropic phase region with electric field. In the unpoled material, the MPB was positioned at the transition from space group R3m to P4mm (BNT-11BT) with optimized permittivity throughout a broad single-phase R3m composition regime. Upon poling, a range of compositions from BNT-6BT to BNT-11BT became two-phase mixture, and maximum piezoelectric coefficient was observed in BNT-7BT. It was shown that optimized electrical properties are related primarily to the capacity for domain texturing and not to phase coexistence.

Typ des Eintrags: Artikel
Erschienen: 2011
Autor(en): Jo, Wook ; Daniels, John E. ; Jones, Jacob L. ; Tan, Xiaoli ; Thomas, Pamela A. ; Damjanovic, Dragan ; Rödel, Jürgen
Titel: Evolving morphotropic phase boundary in lead-free (Bi[sub 1/2]Na[sub 1/2])TiO[sub 3]–BaTiO[sub 3] piezoceramics
Sprache: Englisch
Kurzbeschreibung (Abstract):

The correlation between structure and electrical properties of lead-free (1−x)(Bi1/2Na1/2)TiO3–xBaTiO3 (BNT-100xBT) polycrystalline piezoceramics was investigated systematically by in situ synchrotron diffraction technique, combined with electrical property characterization. It was found that the morphotropic phase boundary (MPB) between a rhombohedral and a tetragonal phase evolved into a morphotropic phase region with electric field. In the unpoled material, the MPB was positioned at the transition from space group R3m to P4mm (BNT-11BT) with optimized permittivity throughout a broad single-phase R3m composition regime. Upon poling, a range of compositions from BNT-6BT to BNT-11BT became two-phase mixture, and maximum piezoelectric coefficient was observed in BNT-7BT. It was shown that optimized electrical properties are related primarily to the capacity for domain texturing and not to phase coexistence.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Journal of Applied Physics
Band: 109
(Heft-)Nummer: 1
Freie Schlagworte: barium compounds, ferroelectric ceramics, ferroelectric transitions, mixtures, permittivity, piezoceramics, sodium compounds, space groups, texture
Fachbereich(e)/-gebiet(e): Fachbereich Material- und Geowissenschaften > Materialwissenschaften > Nichtmetallisch-Anorganische Werkstoffe
Fachbereich Material- und Geowissenschaften > Materialwissenschaften
Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum: 15 Jun 2011 08:14
Offizielle URL: http://dx.doi.org/10.1063/1.3530737
ID-Nummer: 10.1063/1.3530737
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