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On the dielectric response of silica-based polyethylene nanocomposites
The dielectric response of silica-based polyethylene nanocomposites is studied by dielectric spectroscopy. The results indicate that nanocomposites absorb significantly more water than unfilledExpand
Effect of water absorption on dielectric properties of nano-silica/polyethylene composites
The effect of moisture content on the dielectric properties of polymer/nano-silica blends was investigated. It was found that the DC breakdown strength, electrical conductivity and complexExpand
Absorption Current Behaviour of Polyethylene/Silica Nanocomposites
Absorption current is an important characteristic of polymers with regard to their time-domain response to a direct current (DC) poling field. This is because the results of absorption currentExpand
On interfaces and the DC breakdown performance of polyethylene/silica nanocomposites
In this paper, the mechanisms underpinning the concept of filler functionalization in nanodielectrics was studied through the use of silane coupling agents containing different aliphatic chainExpand
On the space charge and DC breakdown behavior of polyethylene/silica nanocomposites
Space charge occurs in a dielectric material when the rate of charge accumulation is different from the rate of removal, which arises due to moving or trapped charges. Inevitably, the local electricExpand
On the effect of functionalizer chain length and water content in polyethylene/silica nanocomposites: Part I — Dielectric properties and breakdown strength
A series of nanoparticles was prepared by functionalizing a commercial nanosilica with alkylsilanes of varying alkyl tail length, from propyl to octadecyl. By using a constant molar concentration ofExpand
X-ray fluorescence as a condition monitoring tool for copper and corrosive sulphur species in insulating oil
Currently there are no standard techniques to detect copper sulphide deposits in transformers to act as an early warning system. This paper develops and tests a procedure using X-Ray FluorescenceExpand
Contact-based corrosion mechanism leading to copper sulphide deposition on insulating paper used in oil-immersed electrical power equipment
XPS and EDX were used to study CuxS deposition in Kraft insulating paper obtained from ageing paper samples in contact with a copper sheet, in mineral oil containing dibenzyl disulphide (DBDS).Expand
An initial study into silver corrosion in transformers following oil reclamation
The problem of corrosive sulfur is extremely well documented in the electrical power industry and to some extent remains a global problem. The presence of corrosive sulfur in transformers is widelyExpand
Silver corrosion in transformers
The impact of corrosive sulfur on high value assets such as transformers is widely reported and can be considered a global problem. A great deal of research and development is focused on theExpand