Static and dynamic electrical breakdown in conducting filled-polymers

L. Lamaignère, F. Carmona and D. Sornette

Physica A: Statistical Mechanics and its Applications, 1997, vol. 241, issue 1, 328-333

Abstract: The electrical resistance of a percolating medium made of a polymer filled with conductive particles may undergo a steep increase over a narrow temperature range above room temperature. A likely mechanism for the effect is the loss of interparticle contact inducing a weakening of the connectivity of the medium as temperature is increased. When Joule heating is used, the sample behavior depends strongly on whether a tension or current source is used. We show that in the first case, at any value of the voltage drop across the sample, a stable state is reached; on the contrary when a convenient exciting current is used, the sample resistance may diverge spontaneously with time. We demonstrate that most of these behaviors are compatible with the predictions of a random thermal fuse model.

Keywords: Composites; Conduction; Percolation; Thermal fuses; Electrical breakdown (search for similar items in EconPapers)
Date: 1997
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:241:y:1997:i:1:p:328-333

DOI: 10.1016/S0378-4371(97)00102-7

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