Title :
An investigation of conduction mechanisms at high-field in PET
Author :
Montanari, G.C. ; Ghinello, I. ; Motori, A. ; Gupta, D. Das
Author_Institution :
Dept. of Electr. Eng., Bologna Univ., Italy
Abstract :
The high-field electrical conduction, up to 60 kV/mm, of PET films is investigated in this paper. The behavior of time-to-peak, observed in transient charging current, vs electrical field fits well with the SCLC model, showing a power relationship. An exponential law is obtained between time-to-peak and temperature. Steady state regime provides charging-current density vs. electrical field plots which show clear transition from an ohmic behavior, at low field, to the SCLC mechanism. The threshold for this transition is a function of temperature
Keywords :
electrical conductivity; high field effects; organic insulating materials; polymer films; space-charge-limited conduction; PET film; SCLC; charging current; high-field electrical conduction; time-to-peak; Capacitors; Dielectrics and electrical insulation; Electrodes; Gold; Positron emission tomography; Power transformer insulation; Steady-state; Temperature distribution; Testing; Voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1997. IEEE 1997 Annual Report., Conference on
Conference_Location :
Minneapolis, MN
Print_ISBN :
0-7803-3851-0
DOI :
10.1109/CEIDP.1997.641109
