Electrical resistivity‐temperature characteristics enhancement of insulating cross‐linked polyethylene composites by incorporating positive temperature coefficient particles with different Curie temperatures

Incorporating positive temperature coefficient (PTC) ceramic particles into polymers provides a prospective alternative solution for suppressing severe electric field distortions caused by negative (NTC) of electrical resistivity within polymer insulation in high voltage direct current cable. The effect the Curie PTC on inhibition NTC cross-linked polyethylene (XLPE) is investigated this study. Positive with varied temperatures are surface-modified and melt blending XLPE. modified dispersed averagely matrix. resistivity, space charge behaviour, (DC) breakdown strength samples at different temperatures, exploring It demonstrated that reduction can further suppress XLPE, enhance DC elevated inhibit internal accumulation. means initiation advances, exhibiting higher potential barrier inhibiting more effectively. This work may give reference improving stability properties XLPE cable insulation.