Dittmer, Robert ; Jo, Wook ; Rödel, Jürgen ; Kalinin, Sergei ; Balke, Nina (2012)
Nanoscale Insight Into Lead-Free BNT-BT-xKNN.
In: Advanced Functional Materials, 22 (20)
doi: 10.1002/adfm.201200592
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Piezoresponse force microscopy (PFM) is used to afford insight into the nanoscale electromechanical behavior of lead-free piezoceramics. Materials based on Bi1/2Na1/2TiO3 exhibit high strains mediated by a field-induced phase transition. Using the band excitation technique the initial domain morphology, the poling behavior, the switching behavior, and the time-dependent phase stability in the pseudo-ternary system (1–x)(0.94Bi1/2Na1/2TiO3-0.06BaTiO3)-xK0.5Na0.5NbO3 (0 <= x <= 18 mol%) are revealed. In the base material (x = 0 mol%), macroscopic domains and ferroelectric switching can be induced from the initial relaxor state with sufficiently high electric field, yielding large macroscopic remanent strain and polarization. The addition of KNN increases the threshold field required to induce long range order and decreases the stability thereof. For x = 3 mol% the field-induced domains relax completely, which is also reflected in zero macroscopic remanence. Eventually, no long range order can be induced for x >= 3 mol%. This PFM study provides a novel perspective on the interplay between macroscopic and nanoscopic material properties in bulk lead-free piezoceramics.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2012 |
| Autor(en): | Dittmer, Robert ; Jo, Wook ; Rödel, Jürgen ; Kalinin, Sergei ; Balke, Nina |
| Art des Eintrags: | Bibliographie |
| Titel: | Nanoscale Insight Into Lead-Free BNT-BT-xKNN |
| Sprache: | Englisch |
| Publikationsjahr: | 23 Oktober 2012 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Advanced Functional Materials |
| Jahrgang/Volume einer Zeitschrift: | 22 |
| (Heft-)Nummer: | 20 |
| DOI: | 10.1002/adfm.201200592 |
| Kurzbeschreibung (Abstract): | Piezoresponse force microscopy (PFM) is used to afford insight into the nanoscale electromechanical behavior of lead-free piezoceramics. Materials based on Bi1/2Na1/2TiO3 exhibit high strains mediated by a field-induced phase transition. Using the band excitation technique the initial domain morphology, the poling behavior, the switching behavior, and the time-dependent phase stability in the pseudo-ternary system (1–x)(0.94Bi1/2Na1/2TiO3-0.06BaTiO3)-xK0.5Na0.5NbO3 (0 <= x <= 18 mol%) are revealed. In the base material (x = 0 mol%), macroscopic domains and ferroelectric switching can be induced from the initial relaxor state with sufficiently high electric field, yielding large macroscopic remanent strain and polarization. The addition of KNN increases the threshold field required to induce long range order and decreases the stability thereof. For x = 3 mol% the field-induced domains relax completely, which is also reflected in zero macroscopic remanence. Eventually, no long range order can be induced for x >= 3 mol%. This PFM study provides a novel perspective on the interplay between macroscopic and nanoscopic material properties in bulk lead-free piezoceramics. |
| Freie Schlagworte: | piezoresponse force microscopy (PFM); lead-free materials; piezoceramics; relaxors |
| 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: | 18 Sep 2012 08:40 |
| Letzte Änderung: | 05 Mär 2013 10:03 |
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