Title :
Charge dynamics in Mylar films corona-charged at various temperatures
Author :
Zhong-fu, Xia ; Guo-mao, Yang ; Xi-min, Sun
Author_Institution :
Pohl Inst., Tongji Univ., Shanghai, China
fDate :
8/1/1992 12:00:00 AM
Abstract :
The discharging behavior of Mylar polyethyleneterephthalate (PETP) films is investigated and discussed in terms of dipole relaxation at 85°C as well as conductivity and trap dynamics at higher temperatures. For comparison, the low-temperature peak due to positive real charge in nonpolar fluoropolymer Teflon FEP is also described. The shift of the mean charge depth in PETP samples charged at elevated temperatures, the transport of detrapped real charge in the bulk of PETP, and the compensation of detrapped charge in the bulk during thermally stimulated discharge are studied by means of heat-pulse experiments as well as measurements of the steady-state conduction current and the bulk conductivity glow curve
Keywords :
corona; dielectric relaxation; glow discharges; polymer films; thermally stimulated currents; 85 degC; Mylar films; Mylar polyethyleneterephthalate; PETP; bulk conductivity glow curve; conductivity; detrapped real charge; dipole relaxation; discharging behavior; heat-pulse experiments; mean charge depth; nonpolar fluoropolymer Teflon FEP; positive real charge; steady-state conduction current; thermally stimulated discharge; trap dynamics; Charge carrier processes; Charge measurement; Conductivity; Corona; Current measurement; Electrets; Electrodes; Sun; Temperature; USA Councils;
Journal_Title :
Electrical Insulation, IEEE Transactions on
