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Title: Anomalous dielectric response of very small quantities of virgin, aged and failed silicone oil.
Authors: Haidar, A.
Fothergill, John C.
Dissado, Len A.
Hopewell, P.
First Published: Apr-2003
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Citation: IEEE Transactions on Dielectrics and Electrical Insulation, 2003, 10 (2), pp. 336-342.
Abstract: A technique is described for making dielectric spectroscopy measurements of very small quantities (<1μl) of oil. The technique utilises surface tension to hold the oil between the plates of a capacitor, the inter-electrode distance being controlled by a micrometer. Breakdown strength can also be estimated using this technique. Three samples of silicone oil, used in cable sealing ends, were tested: virgin, used and failed. A major component in the frequency dependent impedance had the form Z(ω)=B(1-b)(iω)/sup.1-p/). This component was interpreted in terms of a fractal percolation model, and the anomalous thickness dependence predicted by the model verified by varying the inter-electrode distance. The difference observed for the three different samples indicate that conducting contaminants are responsible for the percolation system.
DOI Link: 10.1109/TDEI.2003.1194120
ISSN: 1070-9878
Type: Article
Rights: This is the author's final draft of the paper published as IEEE Transactions on Dielectrics and Electrical Insulation, 2003, 10 (2), pp. 336-342. Copyright © 2003 IEEE. The final version is available from Doi: 10.1109/TDEI.2003.1194120. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Leicester’s products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to By choosing to view this document, you agree to all provisions of the copyright laws protecting it.
Appears in Collections:Published Articles, Dept. of Engineering

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