NDLI: Corona-induced partial discharges, internal charge separation and electromechanical transducer properties in cellular polymer films

Content Provider	IEEE Xplore Digital Library
Author	Wegener, M. Paajanen, M. Wirges, W. Gerhard-Multhaupt, R.
Copyright Year	2002
Description	Author affiliation: Dept. of Phys., Univ. of Potsdam, Germany (Wegener, M.)
Abstract	Recently, porous or cellular polymer films have received a lot of interest as materials for sensor and actuator applications. Films of cellular polypropylene have shown superior electromechanical thickness response when compared to conventional non-porous piezoelectric polymer materials. The electromechanical effect in cellular films originates from electrical discharges across internal gas-filled cells during preparation. The resulting charge separation is different from the charge-separation and dipole-orientation processes in non-cellular piezoelectric films. The aim of this work is to study the relationship between the partial discharges inside the cellular PP and its piezoelectric response. The focus is on the physical effects in the film at the threshold voltage that leads to a piezoelectric response. We studied the effects of charging voltage and charging time on partial discharges, surface potential and piezoelectric coefficient for a few cellular-film grades with different thicknesses. Also, the visible electroluminescence from numerous spots across the film surface during corona charging has been studied.
Sponsorship	IEEE Dielectrics & Electrical Insulation Soc. IEEE Ultrasonics & Frequency Control Soc
Starting Page	54
Ending Page	57
File Size	301658
Page Count	4
File Format	PDF
ISBN	0780375602
DOI	10.1109/ISE.2002.1042942
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-10-03
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Partial discharges Polymer films Piezoelectric films Biological materials Surface charging Surface discharges Piezoelectric transducers Electromechanical sensors Actuators Piezoelectric materials
Content Type	Text
Resource Type	Article

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