TY  - JOUR
A1  - Fang, Peng
A1  - Wang, Feipeng
A1  - Wirges, Werner
A1  - Gerhard, Reimund
A1  - Basso, Heitor Cury
T1  - Three-layer piezoelectrets from fluorinated ethylene-propylene (FEP) copolymer films
JF  - Applied physics : A, Materials science & processing
N2  - 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.
Y1  - 2011
U6  - https://doi.org/10.1007/s00339-010-6008-2
SN  - 0947-8396
SN  - 1432-0630
VL  - 103
IS  - 2
SP  - 455
EP  - 461
PB  - Springer
CY  - New York
ER  -