Percolation Transition in Carbon Composite on the Basis of Fullerenes and Exfoliated Graphite

被引：5

作者：

Berezkin, V. I. ^{[1
]}

Popov, V. V. ^{[2
]}

机构：

[1] Russian Acad Sci, Res Ctr Ecol Safety, St Petersburg, Russia

[2] Russian Acad Sci, Ioffe Inst, St Petersburg, Russia

来源：

PHYSICS OF THE SOLID STATE | 2018年 / 60卷 / 01期

关键词：

D O I：

10.1134/S1063783418010043

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The electrical conductivity of a carbon composite on the basis of C-60 fullerenes and exfoliated graphite is investigated in the range of relative contents of components from 0 to 100%. The samples are obtained by the thermal treatment of the initial dispersed mixtures in vacuum in the diffusion-adsorption process and their further cold pressing. The resistivity of the samples gradually increases with an increase in the fraction of fullerenes, and a sharp transition from the conductive state to the dielectric one is observed after achieving certain concentrations of C-60. The interpretation of the results within the percolation theory makes it possible to evaluate the percolation threshold (expressed as a relative content of graphite) as equal to 4.45 wt % and the critical conductivity index as equal to 1.85 (which is typical for three-dimensional two-component disordered media including those having pores).

引用

页码：207 / 211

页数：5

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