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Polyethylene is commonly used as an insulator for AC power cables. However it is known to undergo chemical and physical change which can lead to dielectric breakdown. Despite almost eighty years of experimental characterization of its electrical properties, very little is known about the details of the electrical behaviour of this material at the molecular level. An understanding of the mechanisms...
We use the pseudopotentials describing the excess electron-polyethylene interaction to study the relation between electron trapping with a series of geometries which are representative of different morphologies found in pure polyethylene (PE). We first use an united atom model to generate these geometries, which include crystalline, lamellae, and amorphous regions, in addition to two interfaces between...
The total dose effect of 60Co gamma-irradiation on MOS (metal-oxide-semiconductor) structure of Al/SiO2/p-Si with different insulation layer thickness has been investigated in this article. MOS capacitors with oxide layer thickness of 5nm/19nm/29nm and electrode area of 1mm2 were prepared using thermal oxidation method. Each structure was stressed with no bias during 60Co gamma-source irradiation...
Simulation model to investigate the statistical property of electrical breakdown is presented based on the field-assisted percolation model for dielectric breakdown, in which the disorder in morphology is expressed through randomly distributed trap barriers. In addition the effects of sample area and the presence of large defects are evaluated. Assuming that one simulation segment represents an actual...
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