Aksel, Elena ; Forrester, Jennifer S. ; Foronda, Humberto M. ; Dittmer, Robert ; Damjanovic, Dragan ; Jones, Jacob L. (2012)
Structure and properties of La-modified Na0.5Bi0.5TiO3 at ambient and elevated temperatures.
In: Journal of Applied Physics, 112 (5)
doi: 10.1063/1.4751357
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The crystal structure and property changes of sodium bismuth titanate (Na0.5Bi0.5TiO3, NBT) piezoelectric ceramics are reported as a function of La modification (0.5–2.0 at. %) and increasing temperature using high resolution x-ray diffraction, permittivity, depolarization, and polarization and strain hysteresis measurements. La substitution is found to decrease the depolarization temperature of NBT (e.g., 1.5 at. % La substitution lowers the depolarization temperature by 60 °C relative to the unmodified composition) with little impact on the room temperature polarization and strain hysteresis. The room temperature structures of the various NBT compositions were modeled using a mixture of the monoclinic Cc space group and the cubic Pmmathm phase, where the Pmmathm phase is used to model local regions in the material which do not obey the long range Cc space group. With increasing La substitution, the lattice parameter distortions associated with the Cc phase approached that of the prototypical cubic unit cell and the fraction of the Pmmathm phase increased. The relationship between these crystallographic changes and the depolarization behavior of La-modified NBT is discussed.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2012 |
| Autor(en): | Aksel, Elena ; Forrester, Jennifer S. ; Foronda, Humberto M. ; Dittmer, Robert ; Damjanovic, Dragan ; Jones, Jacob L. |
| Art des Eintrags: | Bibliographie |
| Titel: | Structure and properties of La-modified Na0.5Bi0.5TiO3 at ambient and elevated temperatures |
| Sprache: | Englisch |
| Publikationsjahr: | 1 September 2012 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Applied Physics |
| Jahrgang/Volume einer Zeitschrift: | 112 |
| (Heft-)Nummer: | 5 |
| DOI: | 10.1063/1.4751357 |
| Kurzbeschreibung (Abstract): | The crystal structure and property changes of sodium bismuth titanate (Na0.5Bi0.5TiO3, NBT) piezoelectric ceramics are reported as a function of La modification (0.5–2.0 at. %) and increasing temperature using high resolution x-ray diffraction, permittivity, depolarization, and polarization and strain hysteresis measurements. La substitution is found to decrease the depolarization temperature of NBT (e.g., 1.5 at. % La substitution lowers the depolarization temperature by 60 °C relative to the unmodified composition) with little impact on the room temperature polarization and strain hysteresis. The room temperature structures of the various NBT compositions were modeled using a mixture of the monoclinic Cc space group and the cubic Pmmathm phase, where the Pmmathm phase is used to model local regions in the material which do not obey the long range Cc space group. With increasing La substitution, the lattice parameter distortions associated with the Cc phase approached that of the prototypical cubic unit cell and the fraction of the Pmmathm phase increased. The relationship between these crystallographic changes and the depolarization behavior of La-modified NBT is discussed. |
| Zusätzliche Informationen: | SFB 595 A1 |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > A - Synthese > Teilprojekt A1: Herstellung keramischer, texturierter Akuatoren mit hoher Dehnung 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > A - Synthese DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung 11 Fachbereich Material- und Geowissenschaften Zentrale Einrichtungen DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche DFG-Sonderforschungsbereiche (inkl. Transregio) |
| Hinterlegungsdatum: | 25 Sep 2012 12:28 |
| Letzte Änderung: | 05 Mär 2013 10:03 |
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