Thermally stimulated discharge and polarization currents in aromatic polyamides

Author

Sussi, M.A. ; Raju, G. R Govinda

Author_Institution

Dept. of Electr. Eng., Windsor Univ., Ont., Canada

fYear

1994

fDate

7-9 Sep 1994

Firstpage

564

Lastpage

569

Abstract

Studies carried out on the Thermally Stimulated Discharge (TSD) and Thermally Stimulated Polarization (TSP) currents in aromatic polyamides are presented. TSD currents are measured at various poling fields, duration of poling. Annealing time and rate of heating during release of charges. The currents show a peak at 135°C for a rate of heating of 1 k/min and the peak shifts to a higher value with increase of rate of heating. Thermally stimulated polarization currents are also measured and the influence of various parameters are investigated. The results show that a dipolar process is applicable which is replaced by interfacial polarization as the temperature is increased. The latter is the predominant mechanism at 200°C, which is in agreement with the charging current measurements in the same material

Keywords

annealing; dielectric polarisation; electrets; organic insulating materials; polymers; thermally stimulated currents; 135 C; 200 C; annealing time; aromatic polyamides; charging current measurements; duration of poling; interfacial polarization; poling fields; rate of heating; thermally stimulated discharge currents; thermally stimulated polarization currents; Annealing; Current measurement; Equations; Heating; Polarization; Power engineering and energy; Temperature measurement; Thermal engineering; Time measurement; Transformers;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 1994. (ISE 8), 8th International Symposium on

Conference_Location

Paris

Print_ISBN

0-7803-1940-0

Type

conf

DOI

10.1109/ISE.1994.514831

Filename

514831