TU Darmstadt / ULB / TUbiblio

Relationship between electromechanical properties and phase diagram in the Ba(Zr0.2Ti0.8)O3–x(Ba0.7Ca0.3)TiO3 lead-free piezoceramic

Acosta, Matias ; Novak, Nikola ; Jo, Wook ; Rödel, Jürgen :
Relationship between electromechanical properties and phase diagram in the Ba(Zr0.2Ti0.8)O3–x(Ba0.7Ca0.3)TiO3 lead-free piezoceramic.
[Online-Edition: http://dx.doi.org/10.1016/j.actamat.2014.07.058]
In: Acta Materialia, 80 pp. 48-55. ISSN 13596454
[Artikel], (2014)

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

Typ des Eintrags: Artikel
Erschienen: 2014
Autor(en): Acosta, Matias ; Novak, Nikola ; Jo, Wook ; Rödel, Jürgen
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
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.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Acta Materialia
Band: 80
Freie Schlagworte: Electroceramic; Perovskites; Ferroelectric; Piezoelectric; Lead-free piezoceramics
Fachbereich(e)/-gebiet(e): Fachbereich Material- und Geowissenschaften > Materialwissenschaften > Nichtmetallisch-Anorganische Werkstoffe
Fachbereich Material- und Geowissenschaften > Materialwissenschaften
Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum: 26 Aug 2014 07:39
Offizielle URL: http://dx.doi.org/10.1016/j.actamat.2014.07.058
ID-Nummer: 10.1016/j.actamat.2014.07.058
Sponsoren: This work was supported by the AdRIA Hesse state center for Adaptronics.
Export:

Optionen (nur für Redakteure)

Eintrag anzeigen Eintrag anzeigen