Modern electrets

Author

Bauer, Siegfried ; Bauer-Gogonea, Simona ; Dansachmüller, Mario ; Graz, Ingrid ; Leonhartsberger, Hans ; Salhofer, Harald ; Schwödiauer, Reinhard

Author_Institution

Soft Matter Phys., Johannes Kepler Univ., Linz, Austria

Volume

1

fYear

2003

fDate

5-8 Oct. 2003

Firstpage

370

Abstract

Ferroelectrets are cellular dielectric materials with an internal bipolar electret charge that exhibit ferroelectric-like hysteresis and switching behavior. Ferroelectrets have found considerable interest for transducer applications, since they mimic piezoelectricity by their unusual electromechanical properties. They offer very high d₃₃ transducer coefficients, comparable with ferroelectric ceramics and typically 20 times larger than that of ferroelectric polymers like PVDF. Ferroelectrets therefore offer a huge potential for the development of large area sensors, as well as for acoustical, ultrasonics, biomedical, underwater and nondestructive testing applications.

Keywords

dielectric hysteresis; electrets; ferroelectric ceramics; ferroelectric switching; piezoelectric transducers; piezoelectricity; polymer films; cellular dielectric materials; d₃₃ transducer coefficients; electromechanical properties; ferroelectrets; ferroelectric ceramics; ferroelectric like hysteresis; ferroelectric polymers; internal bipolar electret charge; mimic piezoelectricity; nondestructive testing; sensors; Acoustic transducers; Biomedical transducers; Ceramics; Dielectric materials; Electrets; Ferroelectric materials; Hysteresis; Piezoelectric transducers; Piezoelectricity; Ultrasonic transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics, 2003 IEEE Symposium on

Print_ISBN

0-7803-7922-5

Type

conf

DOI

10.1109/ULTSYM.2003.1293425

Filename

1293425