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This paper presents the results of the investigation of liquid nitrogen as an insulation liquid. Thereby the influence of sub-cooled liquid nitrogen and the presence of bubbles between Rogowski electrodes stressed with lightning surge impulses are investigated. These bubbles were produced directly on the electrode surface without a damage of the electrode surface. The results show that the sub-cooled...
Recent interests concerning nanocomposites are shifting emphasis from fundamental research to application-oriented research. In this study, nano- and micro-filler mixed composites were made and evaluated toward practical use of nanocomposite insulating materials. Some kinds of the nano-filler/micro-filler combinations such as nano-layered silicate/micro-silica, nano-silica/micro-silica and nano-titania/micro-silica...
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