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Ferroelectric hysteresis in simultaneously stretched and corona-poled PVDF films

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3 Author(s)
Bharti, V. ; Dept. of Phys., Roorkee Univ., India ; Kaura, T. ; Nath, R.

SSCP (simultaneous stretching and corona poling) of PVDF (polyvinylidene fluoride) films has enhanced the ferroelectric properties. D-E hysteresis loops of these films were observed by using the Sawyer-Tower method in the field range 35 to 80 MV/m. The dependence of ferroelectric hysteresis on poling field has also been studied. The average value of remanent polarization ≈82 mC/m2 was observed for the SSCP (simultaneous stretching and corona poling) films, which is significantly higher than the value P≈62 mC/m2 observed for the STCP (stretched and then corona poled) films. Coercive fields of Ec≈61 and 50 MV/m were obtained for the SSCP and the STCP films respectively. A comparison of the IR spectra of the SSCP and the STCP films in perpendicularly polarized light E indicates that the dipolar orientation is better in the SSCP films

Published in:

Dielectrics and Electrical Insulation, IEEE Transactions on  (Volume:4 ,  Issue: 6 )

Date of Publication:

Dec 1997

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