INTERACTIONS OF CARBON NANOTUBES IN A1_2O_3-C REFRACTORIES FOR SLIDING GATE APPLICATIONS

摘要

Carbon nanotubes are promising in improving the thermal shock resistance of carbon containing refractories. The influence of carbon nanotubes on the mechanical properties of A1_2O_3-C refractories has been investigated in various combinations with Al, Si or SiO_2, and the microstructures of the samples were observed by scanning electron microscope. It reveals, that the Al_2O_3-C refractories with combination additives of Al, Si, SiO_2 and CNTs can achieve much better mechanical and thermal properties compared to combination of metallic additives and CNTs, due to the formation of honeycomb structure and nano-size whiskers in the present of microsilica fume and CNTs.