Journal article


Optimal working regime of lead-zirconate-titanate for actuation applications


Publication Details
Author(s): Dittmer R, Webber K, Aulbach E, Jo W, Tan X, Rödel J
Publisher: Elsevier
Publication year: 2013
Volume: 189
Pages range: 187-194
ISSN: 0924-4247

Abstract

The large-signal unipolar behavior of PZT is characterized under combined electrical, thermal, and mechanical loading. Maximum strain S-max and polarization P-max feature a pronounced sensitivity on stress with a field-dependent peak evolving at around -50 MPa that is associated with enhanced non-180 degrees domain switching. As notable strains are achieved in excess of the quasi-statically measured blocking stress, it is suggested that the testing procedure presented within this work is suited to supplement blocking force measurements in order to comprehensively evaluate the electromechanical performance of a piezoceramic. With the suppression of non-180 degrees domain switching at high stress levels, S-max(sigma) decreases at a faster rate than P-max(sigma). Accordingly, the electrostrictive coefficient Q(11) is shown to be stress-dependent. This observation is rationalized with the stress-dependent change of domain processes. It is furthermore found that Q(11) features a notable dependence on temperature, increasing from 0.018 m(4) C-2 at 25 degrees C to 0.028 m(4) C-2 at 150 degrees C under zero-stress. To assess the actuatoric efficiency, a novel figure of merit eta* is defined to quantify the fraction of input energy utilized for mechanical work. (C) 2012 Elsevier B.V. All rights reserved.



How to cite
APA: Dittmer, R., Webber, K., Aulbach, E., Jo, W., Tan, X., & Rödel, J. (2013). Optimal working regime of lead-zirconate-titanate for actuation applications. Sensors and Actuators A-Physical, 189, 187-194. https://dx.doi.org/10.1016/j.sna.2012.09.015

MLA: Dittmer, Robert, et al. "Optimal working regime of lead-zirconate-titanate for actuation applications." Sensors and Actuators A-Physical 189 (2013): 187-194.

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