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Low temperature electrical conductivity of low-density polyethylene/ carbon black composites

Journal of Materials Science: Materials in Electronics, ISSN: 0957-4522, Vol: 16, Issue: 6, Page: 351-354
2005
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The study deals with the electrical characteristics of carbon black/ low-density polyethylene (CB/LDPE) composites of various CB filler concentrations (10, 15, and 20 wt.%). The DC electrical conductivity was studied as a function of filler concentration in low temperature range 25-285 K. It was found that the composites exhibit negative temperature coefficient of resistivity (TCR) at low temperatures and high enhancement in the electrical conductivity with both temperature and carbon black concentration. The observed increase of conductivity with the filler concentration was interpreted through the percolation theory. The dependence of the electrical conductivity of the given composites on temperature (25-285 K) was analyzed in terms of a formula in consistence with Mott hopping mechanism. © Springer Science + Business Media, Inc. 2005.

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