Piezoelectric properties of nonuniform electrets

Author

Kacprzyk, Ryszard ; Motyl, Edmund ; Gajewski, Juliusz B. ; Pasternak, Aleksy

Author_Institution

Tech. Univ. of Wroclaw, Poland

fYear

1993

fDate

2-8 Oct 1993

Firstpage

1743

Abstract

A simple (double-layer) model of a nonuniform dielectric is presented along with results of effective piezoelectric coefficient measurements for polypropylene-polyurethane structures. The layers were made of polymers with a significantly different mechanical properties (Young´s moduli). The estimated piezocoefficient for the double-layer corona-formed foil electret was on the order of that for PVDF sensors. The present results open new technological possibilities for the penetration of high-sensitivity low-cost piezoelements and extend the family of materials suitable for such sensors

Keywords

corona; electrets; piezoelectric transducers; piezoelectricity; polymers; Young´s moduli; dielectric; double layer corona; foil electret; mechanical properties; nonuniform electrets; piezoelectric coefficient measurements; piezoelements; polymers; polypropylene-polyurethane structures; sensors; Dielectric materials; Electrets; Electrodes; Heat engines; Mechanical factors; Permittivity; Piezoelectric effect; Polymers; Resistance heating; Space charge;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting, 1993., Conference Record of the 1993 IEEE

Conference_Location

Toronto, Ont.

Print_ISBN

0-7803-1462-X

Type

conf

DOI

10.1109/IAS.1993.299077

Filename

299077