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Ultra-fast space charge packets in nanostructured epoxy-based materials

This paper reports observations of charge packets in nanostructured epoxy flat specimens with a filler content of 3% and 5%. These packets, behaving as solitons, accumulate very quickly close to the counter electrodes as heterocharge, due to the partially-blocking effect of the specimen/electrode interfaces. The base material, on the contrary, behaves differently: no charge pulses cross the insulation, showing instead a significant homocharge build up. However applying a compression of about 300 kPa to the base material specimen allows a significant amount of heterocharge to begin to accumulate, meaning that the fast charge pulse transport mechanism described above has been incepted.