The effect of temperature on space charge behavior of epoxy resins containing both micro and nano sized fillers

This paper presents results of space charge and conduction current measurements performed at three different temperatures on epoxy resin samples containing micro and nano fillers. The base material is modified by silica with different filler content (ranging from 0 to 65% in weight for the micro filler and 0 to 5% for the nano filler). The results show that space charge accumulation is largely temperature dependent for specimens containing both nano and micro fillers, i.e. space charge decreases considerably with temperature. Specimens with the nanofiller alone, on the contrary, exhibit smaller temperature dependence of space charge accumulation and conduction current (lower activation energy).