DocumentCode :
279283
Title :
Discharging and thermally stimulated polarization (TSP) currents in aromatic polyamides
Author :
Sussi, M.A. ; Raju, G. R Govinda
Author_Institution :
Windsor Univ., Ont., Canada
fYear :
1992
fDate :
7-10 Sep 1992
Firstpage :
127
Lastpage :
130
Abstract :
Discharging current measurements are reported in aramid paper over a wide range of temperatures and electric field strengths. The results show that at lower temperatures dipolar polarization occurs. With increasing temperature there is increasing contribution from interfacial polarization and at 200°C the latter mechanism is predominant. Measurement of thermally stimulated polarization currents supports the proposed mechanism. By separating the dipolar polarization currents from interfacial polarization currents additional evidence has been obtained for the proposed mechanism. An activation energy of 0.84 eV is obtained for the dipolar process. On the basis of Debye theory a relaxation time of 6.3×104 s is obtained at 30°C
Keywords :
dielectric polarisation; dielectric properties of solids; paper; polymer films; thermally stimulated currents; 200 degC; 30 degC; Debye theory; activation energy; aramid paper; aromatic polyamides; dipolar polarization; discharging current measurements; interfacial polarization; relaxation time; thermally stimulated polarization currents;
fLanguage :
English
Publisher :
iet
Conference_Titel :
Dielectric Materials, Measurements and Applications, 1992., Sixth International Conference on
Conference_Location :
Manchester
Print_ISBN :
0-85296-551-6
Type :
conf
Filename :
186898
Link To Document :
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