Zhukov, Sergey ; Fedosov, Sergey ; Seggern, Heinz von (2011)
Piezoelectrets from sandwiched porous polytetrafluoroethylene (ePTFE) films: influence of porosity and geometry on charging properties.
In: Journal of Physics D: Applied Physics, 44 (10)
doi: 10.1088/0022-3727/44/10/105501
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Sandwiched structures of open-porous and solid polymer dielectrics reveal a strong piezoelectric response after proper charging by high electric fields. Here, the electrical properties of corona-poled three-layer FEP/ePTFE/FEP sandwiches are studied theoretically and experimentally with the objective of its possible optimization for the highest piezoelectric activity. Modelling of the charging properties is performed for different sandwich geometries. It is shown that the maximum value of the remanent interface charge density accumulated during poling depends mainly on the ratio of the solid and porous layers thicknesses and on parameter EB, which characterizes the electric breakdown strength of air in the porous layer. EB exhibits specific dependences on porosity and thickness of the porous layer. For a given porous layer EB is independent of the solid film thickness. The obtained results can be utilized to further optimize the sandwich structure as an electromechanically active device.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2011 |
| Autor(en): | Zhukov, Sergey ; Fedosov, Sergey ; Seggern, Heinz von |
| Art des Eintrags: | Bibliographie |
| Titel: | Piezoelectrets from sandwiched porous polytetrafluoroethylene (ePTFE) films: influence of porosity and geometry on charging properties |
| Sprache: | Englisch |
| Publikationsjahr: | 23 Februar 2011 |
| Verlag: | IOP Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Physics D: Applied Physics |
| Jahrgang/Volume einer Zeitschrift: | 44 |
| (Heft-)Nummer: | 10 |
| DOI: | 10.1088/0022-3727/44/10/105501 |
| Kurzbeschreibung (Abstract): | Sandwiched structures of open-porous and solid polymer dielectrics reveal a strong piezoelectric response after proper charging by high electric fields. Here, the electrical properties of corona-poled three-layer FEP/ePTFE/FEP sandwiches are studied theoretically and experimentally with the objective of its possible optimization for the highest piezoelectric activity. Modelling of the charging properties is performed for different sandwich geometries. It is shown that the maximum value of the remanent interface charge density accumulated during poling depends mainly on the ratio of the solid and porous layers thicknesses and on parameter EB, which characterizes the electric breakdown strength of air in the porous layer. EB exhibits specific dependences on porosity and thickness of the porous layer. For a given porous layer EB is independent of the solid film thickness. The obtained results can be utilized to further optimize the sandwich structure as an electromechanically active device. |
| Freie Schlagworte: | electrical, magnetic and optical, surfaces, interfaces and thin films |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Elektronische Materialeigenschaften |
| Hinterlegungsdatum: | 14 Okt 2013 08:46 |
| Letzte Änderung: | 13 Aug 2021 14:08 |
| PPN: | |
| Sponsoren: | The authors are grateful to he Hessische Ministerium für Wissenschaft und Kunst through the LOEWE project ‘Adria’ , and to the Deutsche Forschungsgemeinschaft (DFG) through the graduated school of Tunable Integrated Components in Microwave Technology and Optics (TICMO) for financial support. |
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