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Low density polyethylene (LDPE) has been widely applied on high voltage transmission cables due to its excellent insulating properties, good processability and chemical stability. Large numbers of experimental and theoretical studies have shown that space charge plays an important role in aging and breakdown in LDPE, and the applied voltage can significantly impact charge transport characteristic...
In this paper the behavior of positive charge formed in the vicinity of the (SC) anode at room temperature and under applied DC has been investigated just after the reversal of the sample, and when the sample was combined with another sample without pre-stressing using the pulsed electro acoustic (PEA) method. The results suggest that the PEA system can only show the net charge density, and the space...
In this paper the behavior of positive charge formed in the vicinity of the Semi-conducting sheet anode at room temperature and under applied dc has been investigated just after the reversal of the sample, and when the sample was combined with another sample without pre-stressing using the pulsed electro acoustic (PEA) method. The results suggest that the PEA system can only show the net charge density,...
The generation and migration of space charge packets in low-density polyethylene (LDPE) materials have been investigated in recent papers. A large number of measuring results indicate that space charge behavior show great difference in the course of formation and movement due to the difference of applied field and material characteristic. This gives difficulties to study the feature of packet-like...
Junction varactors form key passive components for RF and analog application where capacitance could be tuned by a control voltage. This paper details and models a reliability degradation mechanism due to electron trapping at the side of shallow trench isolation (STI) of the varactor, leading to systematic capacitance degradation as function of time and stress conditions. A key dimension which controls...
This paper reports on the investigation into space charge characteristics at interfaces of multi-layer polymeric materials. Planar low density polyethylene (LDPE) samples were used in this study. DC voltage up-to 10 kV was applied to the sample and space charge measurements were taken using the pulsed electro-acoustic (PEA) technique. Experimental results indicated that the electrode interface plays...
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