Three-layer piezoelectrets from fluorinated ethylene-propylene (FEP) copolymer films
- 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.
| Author details: | Peng FangGND, Feipeng WangORCiD, Werner WirgesORCiD, Reimund GerhardORCiDGND, Heitor Cury Basso |
|---|---|
| DOI: | https://doi.org/10.1007/s00339-010-6008-2 |
| ISSN: | 0947-8396 |
| ISSN: | 1432-0630 |
| Title of parent work (English): | Applied physics : A, Materials science & processing |
| Publisher: | Springer |
| Place of publishing: | New York |
| Publication type: | Article |
| Language: | English |
| Year of first publication: | 2011 |
| Publication year: | 2011 |
| Release date: | 2017/03/26 |
| Volume: | 103 |
| Issue: | 2 |
| Number of pages: | 7 |
| First page: | 455 |
| Last Page: | 461 |
| Funding institution: | CAPES (Brazil); DAAD (Germany) [D/08/11608]; DFG [WA 2688/1-1]; EU |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| Peer review: | Referiert |
