NDLI: Piezoelectrets from sandwiched porous polytetrafluoroethylene films with different porosity

Content Provider	IEEE Xplore Digital Library
Author	Zhukov, S. von Seggern, H.
Copyright Year	2010
Description	Author affiliation: Institute of Materials Science, Technische Universität Darmstadt, Petersenstrasse 23, 64287 Darmstadt, Germany (Zhukov, S.; von Seggern, H.)
Abstract	The present study deals with the investigation of the poling behavior of individual and sandwiched porous films of polyfluoroethylene (ePTFE) having different porosities ranging from 70% to 98%. In the stand alone porous films (90–98%) the maximum breakdown electric field strength $E^{B}$ follows Paschen's law for air. Therefore those ePTFE films can be considered as a single large air pore with respect to breakdown phenomenon. In the sandwich arrangement the same film exhibits a 2 times higher $E^{B}$ value. On lowering porosity up to 70% the $E^{B}$ value considerably increases. The model proposed in earlier work had no parameter for introducing porosity, but nevertheless well describes the changes of sandwich poling and switching behaviour if the experimental value for $E^{B}$ on porosity is taken into account. The model and the gained insight into the poling process can also be utilized to further optimization of the sandwich structure as an electromechanically active device.
Starting Page	1
Ending Page	4
File Size	161497
Page Count	4
File Format	PDF
ISBN	9781424479450
e-ISBN	9781424479443
e-ISBN	9781424479436
DOI	10.1109/ICSD.2010.5568127
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-07-04
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Films Corona Electric potential Surface charging Hysteresis Integrated circuits piezoelectric coefficients ferroelectrets Paschen breakdown porous ePTFE film
Content Type	Text
Resource Type	Article

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