Charging of cellular space-charge electret films in various gas atmospheres

Mika Paajanen, Michael Wegener, Reimund Gerhard-Multhaupt

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

11 Citations (Scopus)

Abstract

A strong electromechanical transducer effect is achieved in cellular polymer films e.g. by corona charging, which initiates charge separation inside the film. In order to create an effective charge separation, a high electric field is required. The electromechanical effect can be further enhanced by corona charging in high-pressure atmospheres or in various dielectric gases that have high, electrical breakdown strengths. The effect of the gas inside the cellular structure has also been studied. A higher electric field most likely causes more complete charging throughout the cellular film. The electromechanical effect corresponding to the piezoelectric d33 coefficient was enhanced after corona charging at 100-450 kPa or at 100-140 kPa in ambient nitrogen or in nitrous oxide, respectively, with corona voltages of up to 60 kV. The highest d33 coefficient of about 790 pCN-1 was achieved after replacing air with nitrogen gas inside the cellular structure through consecutive low and high-pressure treatments at 293 or at 313 K.
Original languageEnglish
Title of host publication2001 Annual Report Conference on Electrical Insulation And Dielectric Phenomena
PublisherIEEE Institute of Electrical and Electronic Engineers
Pages24-27
ISBN (Print)0-7803-7053-8
DOIs
Publication statusPublished - 2001
MoE publication typeB3 Non-refereed article in conference proceedings
EventIEEE Conference on Electrical Insulation And Dielectric Phenomena, CEIDP 2001 - Kitchener, Canada
Duration: 14 Oct 200117 Oct 2001

Conference

ConferenceIEEE Conference on Electrical Insulation And Dielectric Phenomena, CEIDP 2001
CountryCanada
CityKitchener
Period14/10/0117/10/01

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  • Cite this

    Paajanen, M., Wegener, M., & Gerhard-Multhaupt, R. (2001). Charging of cellular space-charge electret films in various gas atmospheres. In 2001 Annual Report Conference on Electrical Insulation And Dielectric Phenomena (pp. 24-27). IEEE Institute of Electrical and Electronic Engineers. https://doi.org/10.1109/CEIDP.2001.963480