Properties of Al2O3-C Castable Refractories with Graphite Powder Coated with Al2O3

Al2O3-coated graphite powder was prepared by a sol-gel method using ethyl acetoacetate aluminium diisopropoxide. An Al2O3-C castable refractory was prepared from the Al2O3-coated graphite powder. The flowability of this castable refractory was higher than that prepared from a graphite powder. The apparent porosity of the present Al2O3-C castable refractory was lower than that prepared from a graphite powder.