Hillenbrand, J. ; Sessler, Gerhard M. ; Zhang, X. (2005)
Confirmation of a model for the piezoelectricity of ferroelectrets.
Annual Report Conference on Electrical Insulation and Dielectric Phenomena (CEIDP '05). Nashville, TN, USA (1610.2005-19.10.2005)
doi: 10.1109/CEIDP.2005.1560770
Konferenzveröffentlichung, Bibliographie
Kurzbeschreibung (Abstract)
An existing model for the piezoelectric d/sub 33/-coefficients of charged cellular polymers (ferroelectrets) is tested with experimental data obtained from different cellular polypropylene (PP) films. The model assumes the cellular films to consist of plane parallel layers of solid and gaseous material with the surfaces of the solid layers charged in a specific way. Films of the charged cellular PP are expanded by a pressure treatment. Subsequently, due to viscoelastic relaxation, the film thickness decreases, thus causing a change of Young's modulus K. Values of Y are obtained from interferometric measurements of the thickness resonance frequency. Together with the measured thickness of the solid layers and air layers in the material, the d/sub 33/-coefficients can be determined from the model. These values are compared with experimental results for d/sub 33/ also obtained interferometrically by means of the inverse piezoelectric effect. Good agreement between the calculated and measured d/sub 33/-coefficients and their change with film thickness is obtained for all investigated films.
| Typ des Eintrags: | Konferenzveröffentlichung |
|---|---|
| Erschienen: | 2005 |
| Autor(en): | Hillenbrand, J. ; Sessler, Gerhard M. ; Zhang, X. |
| Art des Eintrags: | Bibliographie |
| Titel: | Confirmation of a model for the piezoelectricity of ferroelectrets |
| Sprache: | Englisch |
| Publikationsjahr: | 2005 |
| Ort: | Piscataway, NJ |
| Verlag: | IEEE Operations Center |
| Buchtitel: | CEIDP '05. 2005 Annual Report Conference on Electrical Insulation and Dielectric Phenomena |
| Veranstaltungstitel: | Annual Report Conference on Electrical Insulation and Dielectric Phenomena (CEIDP '05) |
| Veranstaltungsort: | Nashville, TN, USA |
| Veranstaltungsdatum: | 1610.2005-19.10.2005 |
| DOI: | 10.1109/CEIDP.2005.1560770 |
| Kurzbeschreibung (Abstract): | An existing model for the piezoelectric d/sub 33/-coefficients of charged cellular polymers (ferroelectrets) is tested with experimental data obtained from different cellular polypropylene (PP) films. The model assumes the cellular films to consist of plane parallel layers of solid and gaseous material with the surfaces of the solid layers charged in a specific way. Films of the charged cellular PP are expanded by a pressure treatment. Subsequently, due to viscoelastic relaxation, the film thickness decreases, thus causing a change of Young's modulus K. Values of Y are obtained from interferometric measurements of the thickness resonance frequency. Together with the measured thickness of the solid layers and air layers in the material, the d/sub 33/-coefficients can be determined from the model. These values are compared with experimental results for d/sub 33/ also obtained interferometrically by means of the inverse piezoelectric effect. Good agreement between the calculated and measured d/sub 33/-coefficients and their change with film thickness is obtained for all investigated films. |
| Fachbereich(e)/-gebiet(e): | 18 Fachbereich Elektrotechnik und Informationstechnik |
| Hinterlegungsdatum: | 20 Nov 2008 08:26 |
| Letzte Änderung: | 22 Nov 2024 07:53 |
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