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The progressive improvement in the purification techniques of dielectric liquids renders the measurement of their resistivity more and more difficult, sometimes impossible (especially at room temperature) with conventional AC bridges (SCHERING bridge, transformer ratio bridge) they are not sensitive enough to detect losses (tanδ) or conductance G of a cell of capacitance C filled with a liquid of...
The properties of the primary charge carriers formed on ionization of saturated hydrocarbon liquids have been found to display a marked sensitivity to the structure of the individual molecules of the medium. Thus for excess electrons the mobility has been shown to be dramatically influenced by the degree of sphericity of the molecules. For electron holes (solvent radical cations) a high mobility has...
We show, in figs 1–5, how some typical current density characteristics are affected by variations in the model parameters. Although a direct comparison with experiment is not included in the present work the shape and magnitude of these curves agree closely with those obtained from experimental measurements on typical non-polar liquids [8]. Our choice of recombination coefficients is also broadly...
Breakdown of dielectrics has been a serious challenge to physicists and engineers. Until the beginning of this century, very poor explanations were offered. An insulator was often portrayed as a vessel containing the electricity and exploding under the strain of electric pressure.
We describe the various processes by which positive ions at the interface of a metal oxide with a dielectric liquid can be neutralised, and their significance in relation to the initiation of breakdown.
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