Abstract
The dielectric constant of a conductor-insulator composite is measured and no percolation threshold is observed up toV=45%, whereV is the volume fraction of conducting filler. The composite is fabricated by dispersing silver-coated glass spheres in unsaturated polyester. It is found that the dielectric constant varies smoothly as (1−V)−3 within the experimental range and that this relationship may be satisfactorily interpreted on the basis of classical electromagnetic theory.
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