Observation of Charge Compensated Polarization Zones in Polyvinylindenfluoride ( Pvdf ) Films by Piezoelectric Acoustic Step - Wave Response
نویسنده
چکیده
A tugh resolution (2/am) acousUc step-wave probing techmques has been developed to investigate the lnhomogeneous dtstnbutlon of the piezoelectric response of incompletely corona poled 85/am ttuck PVDF films We observe persistent polanzaUon zones or layers of 20-40/am width within the films wtuch are electrostatlcally compensated by charge accumulaUon at the polanzaUon zone boundaries The zone development is explained by charge-trapping m propomon to polanzatmn
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تاریخ انتشار 2002