Thermal stability of a defect-tolerant dielectric

This paper investigates the power frequency, highly inhomogeneous field properties of a dielectric for which the conductivity is an exponential function of the electric field. Oil-paper constitutes the best known example of such a system. Based on solutions to Poisson's equation with field-dependent conductivity and time-dependent voltage, the paper concludes that such a dielectric could be defect-tolerant (electrically and thermally stable in spite of a defect) for reasonable defects geometries.<
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