%0 Journal Article %T Evolution of Space Charges and Conductivity with DC Aging of Polyethylene-Synthetic and Natural Clay Composites %A Mahmoud Abou-Dakka %J Journal of Nanomaterials %D 2012 %I Hindawi Publishing Corporation %R 10.1155/2012/463748 %U http://dx.doi.org/10.1155/2012/463748