| Original Articles |
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Electret Characteristics of Hybrid Films Consisting of Porous
Polytetrafluoroethylene and Teflon Fluoroethylenepropylene with
Corona Charging |
| CHEN Gang-Jin1,2;HAN Gao-Rong1;Rudi Danz3;Burkhard Elling3 |
| 1State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027
2Zhejiang University of Science and Technology, Hangzhou 310027
3Fraunhofer Institute of Applied Polymer Research, Golm, Germany
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| Cite this article: |
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CHEN Gang-Jin, HAN Gao-Rong, Rudi Danz et al 2002 Chin. Phys. Lett. 19 1856-1858 |
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Abstract We have prepared hybrid films consisting of porous polytetrafluoroethylene (PTFE) and Teflon fluoroethylenepropylene (FEP) and we have investigated their charge dynamics of injection, transport and trapping using corona charging, isothermal and thermally stimulated surface-potential decay measurement. The results indicate that the hybrid film samples show different electret characteristics when charged through side PTFE or side FEP. The samples charged negatively through side porous PTFE show the best charge stability. Their charge dynamics differs very much from a single film. The effect of corona polarity on the electret behaviour in the hybrid film is very large. The experimental results are explained with the three structure level model of charge storage in electrets.
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| Keywords:
73.50.Gr
77.84.-s
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Published: 01 December 2002
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| PACS: |
73.50.Gr
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(Charge carriers: generation, recombination, lifetime, trapping, mean free paths)
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77.84.-s
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(Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials)
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