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Improving the Electrical Conductivity of Composites Comprised of Short Conducting Fibers in a Nonconducting Matrix: The Addition of a Nonconducting Particulate Filler

Published online by Cambridge University Press:  21 February 2011

Pu-Woei Chen  and
D. D. L. Chung
Pu-Woei Chen
Affiliation:
Composite Materials Research Laboratory, Furnas Hall, State University of New York at Buffalo, Buffalo, New York 14260-4400
D. D. L. Chung
Affiliation:
Composite Materials Research Laboratory, Furnas Hall, State University of New York at Buffalo, Buffalo, New York 14260-4400
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Abstract

The addition of a second discontinuous filler (silica fume) that is essentially nonconducting to a composite with a comparably non-conducting matrix (cement) and a conducting discontinuous filler (carbon fibers) was found to increase the electrical conductivity of the composite when the conducting filler volume fraction was less than 3.2%. The maximum conducting filler volume fraction for the second filler to be effective was only 0.5% when the second filler was sand, which was much coarser than silica fume. The improved conductivity due to the presence of the second filler is due to the improved dispersion of the conducting filler. The silica fume addition did not affect the percolation threshold, but the sand addition increased the threshold.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 390: Symposium S – Electronic Packaging Materials Science VIII , 1995 , 141
Copyright
Copyright © Materials Research Society 1995

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References

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