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Laminated tubular-channel ferroelectret systems from low-density Polyethylene Films and from Fluoroethylene-propylene Copolymer Films - A comparison

  • A template-based lamination technique for the manufacture of ferroelectrets from uniform electret films was recently reported. In the present work, this technique is used to prepare similar ferroelectret structures from low-density polyethylene (LDPE) films and from fluoro-ethylene-propylene (FEP) copolymer films. A comparative analysis of the pressure-, temperature-, and frequency-dependent piezoelectric properties has been performed on the two ferroelectret systems. It is observed that the FEP ferroelectrets exhibit better piezoelectric responses and are thermally more stable. The difference between the piezoelectric d(33) coefficients of the two ferroelectret systems is partially explained here by their different elastic moduli. The anti-resonance peaks of both structures have been investigated by means of dielectric resonance spectroscopy and electroacoustic sound-pressure measurements. A difference of more than 10 kHz is observed between the anti-resonance frequencies of the two ferroelectret systems.

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Author:Ruy Alberto Pisani Altafim, Dmitry Rychkov, Werner Wirges, Reimund Gerhard-MulthauptORCiDGND, Heitor Cury Basso, Ruy Alberto Correa Altafim, Martin Melzer
ISSN:1070-9878 (print)
Parent Title (English):IEEE transactions on dielectrics and electrical insulation
Publisher:Inst. of Electr. and Electronics Engineers
Place of publication:Piscataway
Document Type:Article
Year of first Publication:2012
Year of Completion:2012
Release Date:2017/03/26
Tag:Ferroelectrets; electro-mechanical transducers; frequency response; piezoelectrets; piezoelectricity; static-pressure dependence; temperature dependence
First Page:1116
Last Page:1123
Funder:CAPES; DAAD [PROBRAL D/08/11608]; European Union
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie
Peer Review:Referiert