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 language | English |
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| Title of host publication | 2001 Annual Report Conference on Electrical Insulation And Dielectric Phenomena |
| Publisher | IEEE Institute of Electrical and Electronic Engineers |
| Pages | 24-27 |
| ISBN (Print) | 0-7803-7053-8 |
| DOIs | |
| Publication status | Published - 2001 |
| MoE publication type | B3 Non-refereed article in conference proceedings |
| Event | IEEE Conference on Electrical Insulation And Dielectric Phenomena, CEIDP 2001 - Kitchener, Canada Duration: 14 Oct 2001 → 17 Oct 2001 |
Conference
| Conference | IEEE Conference on Electrical Insulation And Dielectric Phenomena, CEIDP 2001 |
|---|---|
| Country/Territory | Canada |
| City | Kitchener |
| Period | 14/10/01 → 17/10/01 |