Use of the final thermally stimulated discharge current technique to analyze space charge behavior in dielectrics

Neagu, F. R.
November 2003
Applied Physics Letters;11/17/2003, Vol. 83 Issue 20, p4229
Academic Journal
The final thermally stimulated discharge current technique is proposed for analyzing space charge (SC) trapping/detrapping. The letter investigates the effects associated with SC behavior in polyamide 11 in an attempt to discriminate between dipolar and SC related effects. An apparent peak, located 5–13 °C above the charging temperature, and a second peak around 96 °C were observed. Both peaks scale linearly with the field revealing a similar behavior of dipolar and interfacial polarization. The peaks position and the apparent activation energy W do not change with the charging field, but are very sensitive to the previous charging/discharging times. A distribution of the apparent activation energies in a range from 0.45 to 2.20 eV is revealed for the apparent peaks. The isothermal decay of SC at 35 °C is proportional to log t, a behavior that may be characteristic for the interfacial polarization. © 2003 American Institute of Physics.


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