Improving the electrical conductivity of composites comprised of short conducting fibers in a nonconducting matrix: The addition of a nonconducting particulate filler

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