Three-layer piezoelectrets from fluorinated ethylene-propylene (FEP) copolymer films


Autoria(s): FANG, Peng; WANG, Feipeng; WIRGES, Werner; GERHARD, Reimund; BASSO, Heitor Cury
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

18/10/2012

18/10/2012

2011

Resumo

A process for preparing three-layer piezoelectrets from fluorinated ethylene-propylene (FEP) copolymer films is introduced. Samples are made from commercial FEP films by means of laser cutting, laser bonding, electrode evaporation, and high-field poling. The observed dielectric-resonance spectra demonstrate the piezoelectricity of the FEP sandwiches. Piezoelectric d (33) coefficients up to a few hundred pC/N are achieved. Charging at elevated temperatures can increase the thermal stability of the piezoelectrets. Isothermal experiments for approximately 15 min demonstrate that samples charged at 140A degrees C keep their piezoelectric activity up to at least 120A degrees C and retain 70% of their initial d (33) even at 130A degrees C. Acoustical measurements show a relatively flat frequency response in the range between 300 Hz and 20 kHz.

CAPES (Brazil)

DAAD (Germany)[D/08/11608]

DFG[WA 2688/1-1]

EU

Identificador

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, v.103, n.2, p.455-461, 2011

0947-8396

http://producao.usp.br/handle/BDPI/17701

10.1007/s00339-010-6008-2

http://dx.doi.org/10.1007/s00339-010-6008-2

Idioma(s)

eng

Publicador

SPRINGER

Relação

Applied Physics A-materials Science & Processing

Direitos

restrictedAccess

Copyright SPRINGER

Palavras-Chave #VINYLIDENE FLUORIDE #FERROELECTRETS #TRANSDUCERS #POLYMER #CHARGE #SOFT #Materials Science, Multidisciplinary #Physics, Applied
Tipo

article

original article

publishedVersion