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

Dittmer, Robert and Webber, Kyle G. and Aulbach, Emil and Jo, Wook and Tan, Xiaoli and Rödel, Jürgen (2013):
Optimal working regime of lead–zirconate–titanate for actuation applications.
In: Sensors and Actuators A: Physical, Elsevier Science Publishing, pp. 187-194, 189, ISSN 09244247,
[Online-Edition: http://dx.doi.org/10.1016/j.sna.2012.09.015],
[Article]

Abstract

The large-signal unipolar behavior of PZT is characterized under combined electrical, thermal, and mechanical loading. Maximum strain Smax and polarization Pmax feature a pronounced sensitivity on stress with a field-dependent peak evolving at around −50 MPa that is associated with enhanced non-180° 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° domain switching at high stress levels, Smax(σ) decreases at a faster rate than Pmax(σ). Accordingly, the electrostrictive coefficient Q11 is shown to be stress-dependent. This observation is rationalized with the stress-dependent change of domain processes. It is furthermore found that Q11 features a notable dependence on temperature, increasing from 0.018 m4 C−2 at 25 °C to 0.028 m4 C−2 at 150 °C under zero-stress. To assess the actuatoric efficiency, a novel figure of merit η* is defined to quantify the fraction of input energy utilized for mechanical work.

Item Type: Article
Erschienen: 2013
Creators: Dittmer, Robert and Webber, Kyle G. and Aulbach, Emil and Jo, Wook and Tan, Xiaoli and Rödel, Jürgen
Title: Optimal working regime of lead–zirconate–titanate for actuation applications
Language: English
Abstract:

The large-signal unipolar behavior of PZT is characterized under combined electrical, thermal, and mechanical loading. Maximum strain Smax and polarization Pmax feature a pronounced sensitivity on stress with a field-dependent peak evolving at around −50 MPa that is associated with enhanced non-180° 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° domain switching at high stress levels, Smax(σ) decreases at a faster rate than Pmax(σ). Accordingly, the electrostrictive coefficient Q11 is shown to be stress-dependent. This observation is rationalized with the stress-dependent change of domain processes. It is furthermore found that Q11 features a notable dependence on temperature, increasing from 0.018 m4 C−2 at 25 °C to 0.028 m4 C−2 at 150 °C under zero-stress. To assess the actuatoric efficiency, a novel figure of merit η* is defined to quantify the fraction of input energy utilized for mechanical work.

Journal or Publication Title: Sensors and Actuators A: Physical
Volume: 189
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: Lead–zirconate–titanate; PZT; Stress dependence; Working regime; Temperature dependence; Actuator; Electrostriction; Polarization losses; Efficiency
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Elektromechanik von Oxiden
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > A - Synthesis
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > A - Synthesis > Subproject A1: Manufacturing of ceramic, textured actuators with high strain
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 27 Nov 2012 10:41
Official URL: http://dx.doi.org/10.1016/j.sna.2012.09.015
Additional Information:

SFB 595 A1

Identification Number: doi:10.1016/j.sna.2012.09.015
Funders: This work was financially supported by the Deutsche Forschungsgemeinschaft DFG under SFB595/A1.
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