Skip to Main content Skip to Navigation
Journal articles

Percolation of single-walled carbon nanotubes in ceramic matrix nanocomposites

Abstract : The percolation of carbon nanotubes (CNT) in an electrical insulating ceramic is studied for the first time. The in situ synthesis of the CNT (0.2-25 vol%) by a CCVD route allows to achieve their homogeneous distribution in the spinel matrix. Up to 11 vol% CNT, the DC electrical conductivity (σ) is well fitted by the scaling law of the percolation theory σ=k(p−pc)t with a low percolation threshold pc=0.64 vol%. At the threshold, σ jumps over seven order of magnitude (from 10−10 to 0.0040 S cm−1) and then reaches a maximum at 8.5 S cm−1. The results are discussed in relation with the characteristics of the CNT, their damaging during the hot-pressing at 1300 °C and the microstructure of the composites. CNT-ceramic composites become attractive materials not only for their enhanced mechanical properties, but also for the possibility to tailor the electrical conductivity through the CNT content.
Document type :
Journal articles
Complete list of metadata

Cited literature [18 references]  Display  Hide  Download
Contributor : Open Archive Toulouse Archive Ouverte (oatao) <>
Submitted on : Thursday, December 12, 2013 - 9:34:53 AM
Last modification on : Monday, March 8, 2021 - 1:34:07 PM
Long-term archiving on: : Thursday, March 13, 2014 - 2:15:19 AM


Files produced by the author(s)




Sébastien Rul, Florent Lefèvre-Schlick, Ennio Capria, Christophe Laurent, Alain Peigney. Percolation of single-walled carbon nanotubes in ceramic matrix nanocomposites. Acta Materialia, Elsevier, 2004, vol. 52, pp. 1061-1067. ⟨10.1016/j.actamat.2003.10.038⟩. ⟨hal-00917575⟩



Record views


Files downloads