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Surface fluorination and oxyfluorination were performed for LLDPE to suppress the charge injection under HVDC. The astonishing suppression effects are obtained especially by the oxyfluorination and also by the industrial fluorination, as observed by the measurements of space charge profile based on the PWP method. However, considerably different cases of space charge profile are seen between the laboratory...
Packet-like space charge behavior in polyethylene was firstly indentified in the early 1990's. Much effort has been done to clarify it in physical essence. The space charge density and migrating velocity of space charge packet are of the two main parameters to characterize this phenomenon. The micro-structure could significantly influence charge trap density and trap level, which therefore influence...
In this study, packet-like space charge behavior in linear low-density polyethylene (LLDPE) and LLDPE doped with two different nano-powder (Al2O3, MgO) were investigated by the pressure wave propagation (PWP). This paper focuses on the space charge dynamics and the isothermal decay process in LLDPE doped with Al2O3 and MgO by sligt concentration (0.01 wt%, 0.05 wt%, 0.1 wt%, 0.2 wt%, 0.5 wt%, 1 wt%)...
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