Acosta, Matias ; Novak, Nikola ; Jo, Wook ; Rödel, Jürgen (2014)
Relationship between electromechanical properties and phase diagram in the Ba(Zr0.2Ti0.8)O3–x(Ba0.7Ca0.3)TiO3 lead-free piezoceramic.
In: Acta Materialia, 80
doi: 10.1016/j.actamat.2014.07.058
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The Ba(Zr0.2Ti0.8)O3–x (Ba0.7Ca0.3)TiO3 system was synthesized in a wide compositional range in order to study the relationship between its phase diagram and electromechanical properties. Phase transitions were marked using peaks in temperature-dependent permittivity, providing up to three transitions from the rhombohedral phase to an orthorhombic, tetragonal and finally cubic phase, which meet in a region that is termed the phase convergence region in this work. In situ small and large signal electromechanical properties were studied as a function of temperature with specific emphasis on these transitions. A small signal piezoelectric coefficient, d 33, presents maximized values at the transition from the orthorhombic to the tetragonal phase, while a large signal piezoelectric coefficient, View the MathML sourced33∗, does so at both rhombohedral to orthorhombic and to tetragonal phase transitions. Maximum polarization Pmax was the only quantity determined that had a clear maximum at the phase convergence region.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2014 |
| Autor(en): | Acosta, Matias ; Novak, Nikola ; Jo, Wook ; Rödel, Jürgen |
| Art des Eintrags: | Bibliographie |
| Titel: | Relationship between electromechanical properties and phase diagram in the Ba(Zr0.2Ti0.8)O3–x(Ba0.7Ca0.3)TiO3 lead-free piezoceramic |
| Sprache: | Englisch |
| Publikationsjahr: | November 2014 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Acta Materialia |
| Jahrgang/Volume einer Zeitschrift: | 80 |
| DOI: | 10.1016/j.actamat.2014.07.058 |
| Kurzbeschreibung (Abstract): | The Ba(Zr0.2Ti0.8)O3–x (Ba0.7Ca0.3)TiO3 system was synthesized in a wide compositional range in order to study the relationship between its phase diagram and electromechanical properties. Phase transitions were marked using peaks in temperature-dependent permittivity, providing up to three transitions from the rhombohedral phase to an orthorhombic, tetragonal and finally cubic phase, which meet in a region that is termed the phase convergence region in this work. In situ small and large signal electromechanical properties were studied as a function of temperature with specific emphasis on these transitions. A small signal piezoelectric coefficient, d 33, presents maximized values at the transition from the orthorhombic to the tetragonal phase, while a large signal piezoelectric coefficient, View the MathML sourced33∗, does so at both rhombohedral to orthorhombic and to tetragonal phase transitions. Maximum polarization Pmax was the only quantity determined that had a clear maximum at the phase convergence region. |
| Freie Schlagworte: | Electroceramic; Perovskites; Ferroelectric; Piezoelectric; Lead-free piezoceramics |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 26 Aug 2014 07:39 |
| Letzte Änderung: | 26 Aug 2014 07:39 |
| PPN: | |
| Sponsoren: | This work was supported by the AdRIA Hesse state center for Adaptronics. |
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