TY  - JOUR
A1  - Qiu, Xunlin
A1  - Wirges, Werner
A1  - Gerhard, Reimund
T1  - Polarization and Hysteresis in Tubular-Channel Fluoroethylenepropylene-Copolymer Ferroelectrets
T2  - Ferroelectrics
N2  - Polarization-vs.-applied-voltage hysteresis curves are recorded on tubular-channel fluoroethylene-propylene (FEP) copolymer ferroelectrets by means of a modified Sawyer-Tower circuit. Dielectric barrier discharges (DBDs) inside the cavities are triggered when the applied voltage is sufficiently high. During the DBDs, the cavities become man-made macroscopic dipoles which build up an effective polarization in the ferroelectret. Therefore, a phenomenological hysteresis curve is observed. From the hysteresis loop, the remanent polarization and the coercive field can be determined. Furthermore, the polarization can be related to the respective piezoelectric coefficient of the ferroelectret. The proposed method is easy to implement and is useful for characterization, further development and optimization of ferro- or piezoelectrets.
KW  - Ferroelectrets
KW  - piezoelectrets
KW  - tubular-channel polymer systems
KW  - dielectric barrier discharge (DBD)
KW  - fluoroethylenepropylene (FEP) copolymer
KW  - piezoelectricity-polarization relation
Y1  - 2014
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/37396
SN  - 0015-0193
SN  - 1563-5112
VL  - 472
IS  - 1
SP  - 100
EP  - 109
PB  - Routledge, Taylor & Francis Group
CY  - Abingdon
ER  -