Electromechanical response of cellular electret films

Author

Sessler, G.M. ; Hillenbrand, J.

Author_Institution

Darmstadt Univ. of Technol., Germany

fYear

1999

fDate

1999

Firstpage

261

Lastpage

264

Abstract

Charged films with a cellular structure show pseudo-piezoelectric properties with high transducer constants. The electromechanical response equations of such films are derived for their operation as sensors and actuators. Measurements of the direct and inverse transducer constants, the thermal stability of the charge, and Young´s modulus are presented. By assuming reasonable charge distributions and charge densities, the calculated transducer constants are in good agreement with the measured values. Both the theoretical model and the measurements show the reciprocity of the transducer constants

Keywords

Young´s modulus; electrets; piezoelectric materials; piezoelectric thin films; polymer films; thermal stability; Youngs modulus; actuators; cellular electret films; cellular structure; charge densities; charge distributions; charged films; direct transducer constants; electromechanical response; electromechanical response equations; high transducer constants; inverse transducer constants; pseudo-piezoelectric properties; sensors; thermal stability; Actuators; Charge measurement; Current measurement; Electrets; Electrodes; Equations; Gaussian processes; Piezoelectric films; Piezoelectric transducers; Solids;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 1999. ISE 10. Proceedings. 10th International Symposium on

Conference_Location

Athens

Print_ISBN

0-7803-5025-1

Type

conf

DOI

10.1109/ISE.1999.832037

Filename

832037