Synthesis of hexagonal plate-like Al4SiC4 from calcined bauxite, silica and carbon black

In this study, hexagonal plate-like Al4SiC4 was synthesized from a mixture of calcined bauxite, silica and carbon black powders by a carbothermic reduction. The effects of synthesis temperature and raw materials ratio on the formation process and morphology of Al4SiC4 were investigated. With the increasing of additive amount of SiO2, Al and Si with low melting point occurred and then melted and wrapped Al4SiC4 grains, which promoted the nucleation of Al4SiC4.