Preparation, electrical and thermal properties of new exfoliated graphite-based composites

被引：52

作者：

Afanasov, I. M. ^{[1
]}

Morozov, V. A. ^{[1
]}

Kepman, A. V. ^{[1
]}

Ionov, S. G. ^{[1
]}

Seleznev, A. N. ^{[1
]}

Van Tendeloo, G. ^{[2
]}

Audeev, V. V. ^{[1
]}

机构：

[1] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119991, Russia

[2] Univ Antwerp, EMAT, B-2020 Antwerp, Belgium

来源：

CARBON | 2009年 / 47卷 / 01期

关键词：

MASS-SPECTROMETRY; PERFORMANCE; TRANSPORT; COAL;

D O I：

10.1016/j.carbon.2008.10.004

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Exfoliated graphite samples (EG) with different bulk densities were prepared by the exfoliation of expandable graphite under a thermal shock regime. As a conductive filler, EG has been incorporated successfully into the coal tar pitch matrix by mechanical mixing. The conducting behavior of the composite was interpreted based on the percolation theory. The percolation threshold of the EG/pitch conducting composites at room temperature was as low as 1.5 wt% and did not depend on the bulk density of the EG used. By means of thermogravimetry the improvement of thermal stability of the composites in comparison with pure pitches was detected. The phenomenon was ascribed to heat shielding effect of the EG particles evidenced by matrix-assisted laser desorption/ionization mass spectrometry. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：263 / 270

页数：8

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