Synthesis and characterization of silica coated carbon nanotubes-alumina composite ceramics

摘要

Silica-coated carbon nanotubes compounds were synthesized through coating silica nanoparticles on the surface of carbon nanotubes, by peptization and reflux method with tetraethoxy silicone as a main material. Silica coated carbon nanotubes-alumina composite ceramics were synthesized by adding the SiO_2/CNTs compounds to the alumina ceramic. The surface of composite ceramics were observed by scanning electron microscope (SEM), the coated nanotubes exhibit better dispersion in the alumina substrate over uncoated and play a role of bridging the alumina grains.