Dielectric Loss Factor of Polyvinyledene Fluoride Thin Foils by Transient Current

Asian Resonance(P: ISSN No. 0976-8602 RNI No. UPENG/2012/42622 VOL.-III, ISSUE-III, JULY-2014 E: ISSN No. 2349-9443) 

Abstract


 Devendra K. Sahu 

Department of Physics, R.S. Govt. P.G. College, Lalitpur (U.P.)


Kalpna Chauhan

 Dept of Applied Science & Humanities, Asians Institute Jaipur , Rajasthan


V. S. Yadav 

Department of Physics, Bundelkhand Institute of Engineering & Technology, Jhansi


Shailendra S. Chauhan

 Department of Physics, Lt. Bahadur Singh Degree College, Madhaugarh (U.P.)

The dielectric loss factor of polyvinyledene fluoride (PVDF) thin foils (20m) by using transient currents studies in charging and discharging mode. The variation of transient currents studies in charging and discharging with electric field at different temperature 40-80 oC at polarizing field 100 kV/cm for Al-Al system in charging mode and Al-Al system in discharging mode. The two distinct mechanisms shall be responsible for the current decay. One mechanism is operative in the range of short time giving rise to a straight line on log I vs log t plot with a particular value of decay constant, n1 ,and the other mechanism is operative in the range of long times giving rise to another straight line in log I vs log t plot with a decay constant,n2, of higher value. The value of n1in short time region is 1.76 and value of n2 in long time region is 2.62 for Al-Al electrode system in charging and discharging (Table1). The Activation energy can be found by isochronal curve (Table2). The dielectric loss factor of polyvinyledene fluoride (PVDF) thin foils (20m) by using transient currents studies in charging and discharging mode with the help of applied step voltage f is Hamons frequency (0.1/t). The space charge polarization and Richardson mechanism is contributed in this paper. 

for full paper please visit below link :

http://www.socialresearchfoundation.com/upoadreserchpapers/1/15/1411061218352nd%20%20devendra%20kumarv%20sahoo.pdf

 


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