Title :
Analysis of conduction mechanisms in alumina-filled epoxy resin under dc field and temperature
Author :
Yahyaoui, Hanen ; Notingher, Petru ; Agnel, S. ; Kieffel, Yannick ; Girodet, Alain
Author_Institution :
Inst. d´Electron. du Sud, Univ. Montpellier 2, Montpellier, France
Abstract :
The electrical behavior of an alumina-filled epoxy resin is investigated in view of its use in high voltage applications. Current-voltage characteristics obtained under dc electric fields comprised between 1 kV/mm and 40 kV/mm, at temperatures from 20°C to 105°C, are analyzed. An ohmic behavior is observed at low fields (<;4 kV/mm) across the entire temperature range. At high field, a volume-controlled conduction mechanism (space charge limited currents) is put into evidence below 85°C, and an interface-controlled mechanism (heterocharge-assisted Schottky injection) is found to be predominant at 105°C.
Keywords :
Schottky effect; electric fields; electrical conductivity; epoxy insulation; filled polymers; resins; space charge; Al2O3; DC electric field; conduction mechanisms; current-voltage characteristics; epoxy resin; heterocharge assisted Schottky injection; interface controlled mechanism; ohmic behavior; space charge limited currents; temperature 20 C to 105 C; volume controlled conduction; Current measurement; Dielectrics; Electric fields; Electrodes; Epoxy resins; Temperature measurement;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena (CEIDP), 2013 IEEE Conference on
Conference_Location :
Shenzhen
DOI :
10.1109/CEIDP.2013.6748181