Nitrogen-doped-CNTs/Si3N4 nanocomposites with high electrical conductivity

Manuel Belmonte, Sofía Magdalena Vega-Díaz, Aaron Morelos-Gómez, Pilar Miranzo, M. Isabel Osendi, Mauricio Terrones

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Novel highly electrically conducting nanocomposites consisting of a silicon nitride (Si3N4) ceramic matrix containing up to 13.6vol.% of nitrogen-doped multi-walled carbon nanotubes (CNx) were fabricated. As-synthesized CNx were treated with hydrogen peroxide in order to efficiently detach/isolate the nanotubes from bundles, then they were mixed with the ceramic powders and fully densified using the spark plasma sintering (SPS) technique. Composites containing 13.6vol.% CNx reached an electrical conductivity of 2174Sm-1 that is the highest value reported hitherto for carbon nanotubes/Si3N4 nanocomposites. The nitrogen doping also favored a strong mechanical interlocking between the nanotubes and the Si3N4 matrix; when compared to the undoped carbon nanotubes. These novel nanocomposites could be used in devices associated to power generation or telecommunications.

Original languageEnglish (US)
Pages (from-to)1097-1104
Number of pages8
JournalJournal of the European Ceramic Society
Volume34
Issue number5
DOIs
StatePublished - May 2014

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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