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Method for the estimation of the total displacement of ferroelectric actuators under mixed thermal and electrical loading

Kungl, Hans and Hoffmann, Michael J. (2008):
Method for the estimation of the total displacement of ferroelectric actuators under mixed thermal and electrical loading.
In: Sensors and Actuators A: Physical, pp. 328-336, 144, (2), ISSN 09244247, [Online-Edition: http://dx.doi.org/10.1016/j.sna.2008.01.021],
[Article]

Abstract

The temperature behavior of the displacement of ferroelectric actuators, when operating at varying temperature, is affected by several factors. First of all, there are changes in field induced strain with temperature. However, the total displacement of an actuator depends also on the poling strain and strain from thermal expansion. These two effects are coupled, because thermal expansion is anisotropic and therefore related to the poling texture. At high temperature the texture is subject to changes from thermal depolarization, resulting in additional effects on strain. Direct measurement of the displacement under mixed thermal–electrical loading requires advanced measurement techniques presently not available. Therefore, a method is suggested, how to estimate the total displacement from separate, temperature dependent measurements of remanent strain, field induced strain, strain from thermal depolarization, and thermal expansion in the unpoled state. The results are related to typical operating modes of ferroelectric actuators. With respect to temperature stability of the performance design rules for materials development are derived.

Item Type: Article
Erschienen: 2008
Creators: Kungl, Hans and Hoffmann, Michael J.
Title: Method for the estimation of the total displacement of ferroelectric actuators under mixed thermal and electrical loading
Language: English
Abstract:

The temperature behavior of the displacement of ferroelectric actuators, when operating at varying temperature, is affected by several factors. First of all, there are changes in field induced strain with temperature. However, the total displacement of an actuator depends also on the poling strain and strain from thermal expansion. These two effects are coupled, because thermal expansion is anisotropic and therefore related to the poling texture. At high temperature the texture is subject to changes from thermal depolarization, resulting in additional effects on strain. Direct measurement of the displacement under mixed thermal–electrical loading requires advanced measurement techniques presently not available. Therefore, a method is suggested, how to estimate the total displacement from separate, temperature dependent measurements of remanent strain, field induced strain, strain from thermal depolarization, and thermal expansion in the unpoled state. The results are related to typical operating modes of ferroelectric actuators. With respect to temperature stability of the performance design rules for materials development are derived.

Journal or Publication Title: Sensors and Actuators A: Physical
Volume: 144
Number: 2
Uncontrolled Keywords: Ferroelectrics; Actuator; Piezoelectricity
Divisions: DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > A - Synthesis > Subproject A2: Manufacturing and characterization of PZT-ceramics with defined defect chemistry
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
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 27 Jul 2011 10:56
Official URL: http://dx.doi.org/10.1016/j.sna.2008.01.021
Additional Information:

SFB 595 A2

Identification Number: doi:10.1016/j.sna.2008.01.021
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