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
Article, Bibliographie
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.
| Item Type: | Article |
|---|---|
| Erschienen: | 2014 |
| Creators: | Yao, Fang-Zhou ; Patterson, Eric A. ; Wang, Ke ; Jo, Wook ; Rödel, Jürgen ; Li, Jing-Feng |
| Type of entry: | Bibliographie |
| Title: | Enhanced bipolar fatigue resistance in CaZrO3-modified (K,Na)NbO3 lead-free piezoceramics |
| Language: | English |
| Date: | 20 June 2014 |
| Journal or Publication Title: | Applied Physics Letters |
| Volume of the journal: | 104 |
| Issue Number: | 24 |
| DOI: | 10.1063/1.4884826 |
| 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. |
| Uncontrolled Keywords: | Ceramics; Piezoelectric fields; Electrical resistivity; Domain walls; Electrodes |
| Divisions: | 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences |
| Date Deposited: | 24 Jun 2014 08:55 |
| Last Modified: | 24 Jun 2014 09:04 |
| PPN: | |
| Funders: | 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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