Yao, Fang-Zhou ; Patterson, Eric A. ; Wang, Ke ; Jo, Wook ; Rödel, Jürgen ; Li, Jing-Feng (2014)
Enhanced bipolar fatigue resistance in CaZrO3-modified (K,Na)NbO3 lead-free piezoceramics.
In: Applied Physics Letters, 104 (24)
doi: 10.1063/1.4884826
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The bipolar fatigue behavior of (K,Na)NbO3 (KNN)-based lead-free piezoceramics was investigated. A comparative analysis demonstrated that CaZrO3-modified KNN ceramics exhibited highly enhanced bipolar fatigue resistance due to the reduced lattice distortion (c/a ratio) and coexistence of orthorhombic and tetragonal phases. The hypothesis was verified by systematical studies of cycle-dependent large and small signal parameters and micro-morphologies. It was identified that mechanical stress induced microstructure damage beneath the electrodes renders the KNN ceramics to be vulnerable to bipolar cycling; while the mild fatigue behavior for CaZrO3-modified ones mainly originates from a thermally reversible domain wall pinning.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2014 |
| Autor(en): | Yao, Fang-Zhou ; Patterson, Eric A. ; Wang, Ke ; Jo, Wook ; Rödel, Jürgen ; Li, Jing-Feng |
| Art des Eintrags: | Bibliographie |
| Titel: | Enhanced bipolar fatigue resistance in CaZrO3-modified (K,Na)NbO3 lead-free piezoceramics |
| Sprache: | Englisch |
| Publikationsjahr: | 20 Juni 2014 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Applied Physics Letters |
| Jahrgang/Volume einer Zeitschrift: | 104 |
| (Heft-)Nummer: | 24 |
| DOI: | 10.1063/1.4884826 |
| Kurzbeschreibung (Abstract): | The bipolar fatigue behavior of (K,Na)NbO3 (KNN)-based lead-free piezoceramics was investigated. A comparative analysis demonstrated that CaZrO3-modified KNN ceramics exhibited highly enhanced bipolar fatigue resistance due to the reduced lattice distortion (c/a ratio) and coexistence of orthorhombic and tetragonal phases. The hypothesis was verified by systematical studies of cycle-dependent large and small signal parameters and micro-morphologies. It was identified that mechanical stress induced microstructure damage beneath the electrodes renders the KNN ceramics to be vulnerable to bipolar cycling; while the mild fatigue behavior for CaZrO3-modified ones mainly originates from a thermally reversible domain wall pinning. |
| Freie Schlagworte: | Ceramics; Piezoelectric fields; Electrical resistivity; Domain walls; Electrodes |
| 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: | 24 Jun 2014 08:55 |
| Letzte Änderung: | 24 Jun 2014 09:04 |
| PPN: | |
| Sponsoren: | This work was supported by National Nature Science Foundation of China (Grant Nos. 51332002, 51302144, 51221291, and 51211140345), Specialized Research Fund for the Doctoral Program of Higher Education (Grant No. 20130002120031), , and Tsinghua University Initiative Scientific Research Program (Grant No. 20131089230). K. Wang acknowledges the Alexander von Humboldt foundation for a fellowship. |
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