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 language||English (US)|
|Number of pages||8|
|Journal||Journal of the European Ceramic Society|
|State||Published - May 2014|
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry