The authors are indebted to a multitude of persons having contributed to the results presented here: Emil Aulbach, Nina Balke, Arnab Chaddhopadhyai, Jürgen Nuffer, Cyril Verdier, and Yong Zhang; Axel Endriss, Marianne Hammer, Michael Hoffmann, Christopher S. Lynch, Dayu Zhou and others. Financial support by the Deutsche Forschungsgemeinschaft (SFB 595, Lu729/1, Lu729/4) is greatly acknowledged.
Fatigue In Bulk Lead Zirconate Titanate Actuator Materials†
Article first published online: 3 NOV 2005
Copyright © 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Engineering Materials
Special Issue: TU Darmstadt
Volume 7, Issue 10, pages 882–898, October, 2005
How to Cite
Lupascu, D. and Rödel, J. (2005), Fatigue In Bulk Lead Zirconate Titanate Actuator Materials. Adv. Eng. Mater., 7: 882–898. doi: 10.1002/adem.200500117
- Issue published online: 3 NOV 2005
- Article first published online: 3 NOV 2005
- Actuator materials;
Fatigue in ferroelectric ceramics is the gradual change of material properties with cyclic loading. It is caused by microscopic material modifications of mechanical or electrical origin. Due to the electromechanical coupling, both mechanisms can yield similar or even identical changes in properties. Macroscopically, a reduction of switchable polarization is anticipated and asymmetries in the macroscopic hysteresis curves arise due to charge carrier migration. This review elaborates on the multiple loading scenarios that lead to asymmetries in material response and loss in performance. The disparities between unipolar, bipolar, and mixed electromechanical loading are displayed. Possible microscopic origins are categorized. The strong similarities in the roles of microcracks, dielectric layers, and grain boundaries are worked out.