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Determination of Effective Material Parameters for Piezoelectric Multilayer Actuators

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4 Author(s)
Leder, E. ; Friedrich-Alexander Univ. Erlangen-Nuremberg, Erlangen ; Hegewald, T. ; Kaltenbacher, M. ; Lerch, R.

A metrological approach for the determination of effective material parameters for piezoelectric multilayer actuators is presented. The elastic, dielectric and coupling constants s33 E, epsiv33 S , epsiv33 T, e33 and d33 are determined systematically for different constellations of mechanical and electrical prestress and sinusoidal excitation. Device losses are taken into account by treating all parameters as complex valued. Clamping the observed actuator with constant strain or constant stress is achieved with an active measurement setup. The results of the material parameters are fitted with n-dimensional taylor expansions. We show the accordance of these functions with the measured material parameters. The paper concludes with results from the determined functional dependencies and a compare with material parameters of the bulk material.

Published in:

Applications of ferroelectrics, 2006. isaf '06. 15th ieee international symposium on the

Date of Conference:

July 30 2006-Aug. 3 2006