Modeling of trapped charge effects in ferroelectrics: application to piezoactuators

E. Klotins; K. Kundzins; A Sternberg; V. Zauls; A. James; B. Andersen

doi:10.1117/12.266524

4 February 1997 Modeling of trapped charge effects in ferroelectrics: application to piezoactuators

E. Klotins, K. Kundzins, A Sternberg, V. Zauls, A. James, B. Andersen

Proceedings Volume 2967, Optical Inorganic Dielectric Materials and Devices; (1997) https://doi.org/10.1117/12.266524
Event: International Conference on Advanced Optical Materials and Devices, 1996, Riga, Latvia

Abstract

The strain response of lead zirconate titanate piezoelectric multilayer actuators have been measured up to 10⁷ N/m² stress and the 3.10⁶ V/m periodic unipolar driving voltage. An additional nonstationary strain component is detected. This effect is explained in terms of a simple solution of polarization kinetics specific for unipolar driving voltage. Preliminary experimentally assertions are given for space charge effects which manifest itself in the strain as well as charge plot after removing the mechanical load. It demonstrates that the static load free equilibrium of the actuator is not complete and the charge recently supported by the piezo voltage and then trapped forms a nonuniform space charge field confining the strain relaxation.

Citation Download Citation

E. Klotins, K. Kundzins, A Sternberg, V. Zauls, A. James, and B. Andersen "Modeling of trapped charge effects in ferroelectrics: application to piezoactuators", Proc. SPIE 2967, Optical Inorganic Dielectric Materials and Devices, (4 February 1997); https://doi.org/10.1117/12.266524

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