Abstract: Aluminum titanate was prepared by solid reaction and sintering process with alumina-titania slag as main raw material from a ferroalloy plant.The effects of ZrSiO₄ on the decomposition rate and sintering properties of aluminum titanate sintered at different temperatures were studied.Crystalline phase composition，lattice parameters，relative crystallinity，and microstructure were analyzed by XRD，SEM，and related software.Results showed that the solid reaction of aluminum titanate was accelerated by substitution of Zr⁴⁺ and Si⁴⁺ in ZrSiO₄ to Ti⁴⁺ in aluminum titanate.It was beneficial for reducing the decomposition rate of aluminum titanate material and enhancing its tightness by adding ZrSiO₄.The influence of ZrSiO₄ on aluminum titanate material will be increased by elevating calcining temperature and the decomposition of aluminum titanate could be inhibited accordingly.

Key words: ZrSiO₄, aluminum titanate, solid reation, decomposition rate