Title :
Origins of thermally stimulated current peaks in polyethersulfone investigated through the measurements of space charge distribution
Author :
Kim, E.J. ; Takeda, T. ; Ohki, Y.
Author_Institution :
Dept. of Electr. Eng., Waseda Univ., Tokyo, Japan
Abstract :
The mechanism of electrical conduction in polyethersulfone (PES) is investigated through the thermally stimulated current (TSC), dc conduction current, and space charge distribution. PES has two TSC peaks below the glass transition temperature of 225°C. The peak temperature of the lower-temperature TSC, β, increases with an increase in the poling temperature. Through the measurements of space charge distribution by the pulsed electroacoustic method done in combination with the TSC measurements, β peak is considered to be due to ions. Furthermore, the dc conduction current obeys the ionic hopping conduction model, suggesting that the dominant carriers are ions
Keywords :
hopping conduction; organic insulating materials; polymers; space charge; thermally stimulated currents; β peak; DC conduction current; PES; electrical conduction; glass transition temperature; ionic hopping conduction model; poling temperature; polyethersulfone; pulsed electroacoustic measurements; space charge distribution; thermally stimulated current; Charge measurement; Current measurement; Glass; Insulation; Pulse measurements; Pulsed electroacoustic methods; Space charge; Temperature; Thermal conductivity; Thermal engineering;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1995. Annual Report., Conference on
Conference_Location :
Virginia Beach, VA
Print_ISBN :
0-7803-2931-7
DOI :
10.1109/CEIDP.1995.483770
