The effect of annealing time on thermally stimulated discharge current of corona-charged ethyl cellulose

Short circuit thermally stimulated discharge current (TSDC) has been recorded in corona-charged ethyl cellulose foil samples at different annealing time. An analysis of the data reveals significant changes in the TSDC curves of the samples as a function of annealing time. The possible relaxation pro...

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Veröffentlicht in:Journal of thermal analysis and calorimetry 2011-02, Vol.103 (2), p.679-683
Hauptverfasser: Gaur, Mulayam Singh, Singh, Reeta, Singh, Pramod Kumar, Indolia, Ajay Pal, Singh, Ranjit
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Sprache:eng
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Zusammenfassung:Short circuit thermally stimulated discharge current (TSDC) has been recorded in corona-charged ethyl cellulose foil samples at different annealing time. An analysis of the data reveals significant changes in the TSDC curves of the samples as a function of annealing time. The possible relaxation processes accounting for the changes are discussed, not only a shift of peak temperature of the observed peak to higher temperatures, but also a lowering in its height has been observed with increase in annealing time. Peak temperature higher than 343 K did not arise even for the annealing time of 240 h. The activation energy ( A ) has been found to increase, while the trapped charge carrier n t decrease with increase in annealing time. Linear relationship between ln  A and n t indicated an exponential distribution of traps.
ISSN:1388-6150
1588-2926
1572-8943
DOI:10.1007/s10973-010-1010-7