Title :
On the Nature of Poling by Corona Charging and the Pyroelectric Effect in PVF2
Author :
Das-Gupta, Dilip K. ; Doughty, Kevin
Author_Institution :
School of Electronic Energy Science, University College of North Wales, Bangor, Gwynedd, LL57 1UT, United Kingdom.
Abstract :
The effect of corona charging (at 12.5 kV) of polyvinylidine fluoride (PVF2) is studied by infrared spectroscopy and X-ray diffraction techniques. The results show that changes in molecular conformation occur with such a poling process that is in agreement with Southgate. The pyroelectric coefficient was observed to increase significantly after such a poling, reaching a maximum value of ~3 nC/cm2K at ~343 K. It is suggested that the pyroelectricity in PVF2 at this temperature is due to dipolar orientation.
Keywords :
Corona; Crystallization; Infrared spectra; Piezoelectric effect; Piezoelectric films; Piezoelectric polarization; Piezoelectricity; Pyroelectricity; Spectroscopy; Temperature;
Journal_Title :
Industry Applications, IEEE Transactions on
DOI :
10.1109/TIA.1978.4503568
