NDLI: Dielectric barrier micro-discharges: mechanism for the charging of piezoelectric polymer foams

Content Provider	IEEE Xplore Digital Library
Author	Lindner, M. Schwodiauer, R. Dansachmuller, M. Bauer-Gogonea, S. Bauer, S.
Copyright Year	2002
Description	Author affiliation: Appl. Phys., Johannes Kepler Univ., Linz, Austria (Lindner, M.; Schwodiauer, R.; Dansachmuller, M.; Bauer-Gogonea, S.; Bauer, S.)
Abstract	Dielectric barrier micro-discharges within the voids of cellular polymers are shown to be responsible for the charging of cellular space-charge electrets and also for the large piezoelectricity in these materials. Above the threshold voltage for breakdown in the voids, the micro-discharges are evidenced by light emission from the polymer, as well as by hysteresis loops in the dielectric and electromechanical properties versus applied voltage. Although cellular space-charge electrets are based on nonpolar dielectrics, the hysteresis in displacement and mechanical strain demonstrate close similarities to ferroelectric materials. The monitoring of the light emission during breakdown provides a quick and easy check for the suitability of cellular space-charge electrets for piezoelectric applications. It also allows for the visualisation of micro-pores in foams in a non-destructive way.
Sponsorship	IEEE Dielectrics & Electrical Insulation Soc. IEEE Ultrasonics & Frequency Control Soc
Starting Page	106
Ending Page	109
File Size	347470
Page Count	4
File Format	PDF
ISBN	0780375602
DOI	10.1109/ISE.2002.1042955
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	Polymer foams Electrets Threshold voltage Breakdown voltage Hysteresis Piezoelectricity Biological materials Dielectric materials Piezoelectric materials Dielectric breakdown
Content Type	Text
Resource Type	Article

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