Conduction mechanisms in some graphite - polymer composites: the effect of a direct-current electric field
- 10 March 1997
- journal article
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 9 (10), 2225-2237
- https://doi.org/10.1088/0953-8984/9/10/011
Abstract
This paper deals with the possible conduction mechanisms in highly anisotropic composites comprising 0 - 10 vol% graphite flakes within a polymer host. Conductivity measurements as a function of DC electric field have been made. In most cases, a non-linear behaviour of the current - voltage relationships is observed. A number of theoretical models are considered and we show that none of them is, by itself, able to explain our results. We further develop several arguments which lead us to consider the existence of a combined tunnelling effect and ionic conduction mechanism.This publication has 23 references indexed in Scilit:
- Composites based on micron-sized exfoliated graphite particles: Electrical conduction, critical exponents and anisotropyJournal of Physics and Chemistry of Solids, 1996
- Critical concentration in percolating systems containing a high-aspect-ratio fillerPhysical Review B, 1996
- Evidence for superlocalization on a fractal network in conductive carbon-black–polymer compositesPhysical Review Letters, 1992
- Moderate-field variable-range hopping transportJournal of Non-Crystalline Solids, 1987
- Temperature dependence of the resistivity in polymer–conducting-carbon-black compositesPhysical Review B, 1987
- Electrical properties and conduction mechanisms of Ru-based thick-film (cermet) resistorsJournal of Applied Physics, 1977
- A percolation treatment of high-field hopping transportJournal of Physics C: Solid State Physics, 1976
- Temperature- and field-dependence of hopping conduction in disordered systems, IIPhilosophical Magazine, 1975
- Hopping conduction in amorphous solidsPhilosophical Magazine, 1971
- Equilibrium Space Charge at the Contact of a Metal and a Pure Highly lnsulating Liquid and Its Influence on High -Field ConductivityJournal of the Electrochemical Society, 1960