TY - JOUR
T1 - Three-layer ferroelectrets from perforated Teflon®-PTFE films fused between two homogeneous Teflon®-FEP films
AU - Basso, H. C.
AU - Altafim, R. A.P.
AU - Altafim, R. A.C.
AU - Mellinger, A.
AU - Fang, Peng
AU - Wirges, W.
AU - Gerhard, R.
PY - 2007
Y1 - 2007
N2 - In this contribution, we propose a new route towards polymer ferroelectrets with uniform voids: Two homogeneous Teflon®-FEP films are separated by, but also thermally fused to a Teflon®-PTFE film with several homogeneous holes. Closed voids with FEP top and bottom lids and PTFE walls are thus formed. After internally charging the top and bottom FEP layers with positive and negative polarity, respectively, the voids constitute large dipoles that can be deformed by mechanical or electrical stresses. Consequently, the three-layer sandwich exhibits direct and inverse piezoelectricity. The continuous layer-fusing process involves a press with hot cylindrical rolls that operate at temperatures up to 310 °C, which may allow production of inexpensive transducer materials on a large scale. We report about the concept, the processing, the charging and the electromechanical performance of the three-layer ferroelectrets.
AB - In this contribution, we propose a new route towards polymer ferroelectrets with uniform voids: Two homogeneous Teflon®-FEP films are separated by, but also thermally fused to a Teflon®-PTFE film with several homogeneous holes. Closed voids with FEP top and bottom lids and PTFE walls are thus formed. After internally charging the top and bottom FEP layers with positive and negative polarity, respectively, the voids constitute large dipoles that can be deformed by mechanical or electrical stresses. Consequently, the three-layer sandwich exhibits direct and inverse piezoelectricity. The continuous layer-fusing process involves a press with hot cylindrical rolls that operate at temperatures up to 310 °C, which may allow production of inexpensive transducer materials on a large scale. We report about the concept, the processing, the charging and the electromechanical performance of the three-layer ferroelectrets.
UR - http://www.scopus.com/inward/record.url?scp=51249095396&partnerID=8YFLogxK
U2 - 10.1109/CEIDP.2007.4451625
DO - 10.1109/CEIDP.2007.4451625
M3 - Conference article
AN - SCOPUS:51249095396
SN - 0084-9162
SP - 453
EP - 456
JO - Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
JF - Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
M1 - 4451625
T2 - 2007 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
Y2 - 14 October 2007 through 19 October 2007
ER -