Title :
High-field conductivity measurements and search for threshold in PET films
Author :
Montanari, G.C. ; Ghinello, I. ; Motori, A. ; Gubanski, S. ; Gupta, D. Das
Author_Institution :
Dept. of Electr. Eng., Bologna Univ., Italy
Abstract :
In the paper results of measurements of DC charging current performed at different values of electrical field and temperature on PET films are presented. The aim is to investigate the threshold of space charges trapping, detected on the basis of the appearance of a maximum in the charging current vs. time characteristics. The values of threshold (function of temperature) thus derived are compared with the results of accelerated life tests performed, under DC voltage and temperature, on the same films until the occurrence of electrical breakdown. It is shown that a relationship exists between the threshold of charge trapping, detected by charging current measurements, and that of electrical breakdown, deriving from multi-stress life tests
Keywords :
electric breakdown; electrical conductivity; high field effects; polymer films; space charge; DC charging current; PET film; electrical breakdown; high-field conductivity; multi-stress accelerated life testing; space charge trapping; threshold; Breakdown voltage; Conductivity measurement; Current measurement; Electric breakdown; Electric variables measurement; Life testing; Performance evaluation; Positron emission tomography; Space charge; Temperature;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1996., IEEE 1996 Annual Report of the Conference on
Conference_Location :
Millbrae, CA
Print_ISBN :
0-7803-3580-5
DOI :
10.1109/CEIDP.1996.564577
