Title :
Polarization and space charge in thermally poled polyvinylidene fluoride (PVDF)
Author :
Neagu, E.R. ; Hornsby, J.S. ; Das-Gupta, D.K.
Author_Institution :
Dept. of Phys., Iasi Univ., Romania
Abstract :
Studies of spatial distributions of space charge/polarization in biaxially oriented and prepoled polyvinylidene fluoride (PVDF) films by laser intensity modulation method (LIMM) and hysteresis measurement at 1 Hz and room temperature confirm that the nonuniform polarization distribution, which appears to get progressively enhanced towards the anode with increasing poling field, arises from dipolar orientation. Injected space charges, localized near the electrode polymer interface, tend to prevent the formation of uniform polarization in the polymer bulk
Keywords :
dielectric hysteresis; dielectric polarisation; ferroelectric materials; polymer films; space charge; 1 Hz; PVDF film; biaxial orientation; hysteresis; laser intensity modulation; polarization; polyvinylidene fluoride; space charge; thermal poling; Anodes; Charge measurement; Current measurement; Electrodes; Hysteresis; Intensity modulation; Polarization; Polymers; Space charge; Temperature distribution;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1998. Annual Report. Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-5035-9
DOI :
10.1109/CEIDP.1998.732975
