Electrical-conduction mechanisms in polymer–copper-particle composites. I. Temperature and high-magnetic-field dependence of the conductivity

C. Pierre; R. Deltour; J. A. A. J. Perenboom; P. J. M. Van Bentum

doi:10.1103/PhysRevB.42.3380

Electrical-conduction mechanisms in polymer–copper-particle composites. I. Temperature and high-magnetic-field dependence of the conductivity

C. Pierre, R. Deltour, J. A. A. J. Perenboom, and P. J. M. Van Bentum

Phys. Rev. B 42, 3380 – Published 15 August 1990

Abstract

A new method for the preparation of conducting copper-polymer composites is proposed. The origin of the electrical-conduction mechanism in these plastics is determined from an analysis of the temperature (T=4–300 K) and magnetic-field dependence (B=0–15 T) of the resistance. The observed saturation of the conductivity at high concentrations of the metallic particles is due to electrical transport across microcontacts between the copper particles. At low temperature these microcontacts are in the Sharvin regime (ballistic regime). This model for the electrical conduction can be extrapolated to similar systems and suggests ways to efficiently produce highly conductive plastic-metal composites.

Received 5 January 1990

DOI:https://doi.org/10.1103/PhysRevB.42.3380

Authors & Affiliations

C. Pierre and R. Deltour

Physique des Solides, CP233, Université Libre de Bruxelles, boulevard du Triomphe, B-1050 Bruxelles, Belgium

J. A. A. J. Perenboom and P. J. M. Van Bentum

High-Field Magnet Laboratory and Research Institute for Materials, University of Nijmegen, Toernooiveld, NL-6525 ED Nijmegen, The Netherlands

Electrical-conduction mechanisms in polymer–copper-particle composites. II. (1/f)-noise measurements in the percolation limit

C. Pierre, R. Deltour, J. Van Bentum, J. A. A. J. Perenboom, and R. Rammal

Phys. Rev. B 42, 3386 (1990)

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Vol. 42, Iss. 6 — 15 August 1990

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