Abstract
The electric poling behaviors of poly(vinylidene fluoride) (PVDF) thin films prepared by solution-casting method were characterized using X-ray diffraction (XRD) and atomic force microscopy (AFM). The ferroelectric properties of PVDF films were also investigated. The present study gives an immediate evidence of a progressive phase transition taking place in PVDF films during electric poling. The phase transitions are characterized as /spl alpha/ phase to /spl beta/ phase via middle /spl delta/ phase with increment of poled electric field intensity. According to ferroelectric hysteresis performance of PVDF films, it can be found that the trend of remnant polarization P/sub r/ which increases with the poled electric field intensity is coincident with Boltzmann distributing function. And the results indicate that the range of the poled electric field intensity which brings about the maximal remnant polarization P/sub r/ was 105-125 MV/m, the P/sub r/ could be as high as 6 /spl mu/C/cm/sup 2/.
Published Version
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