CHEN Xiaohu, LU Jun, QU Lang, CHEN Zhouping, CHEN Xiaomin

(College of Materials Science and Engineering, Huaqiao University, Quanzhou, 362021, China)

Abstract: The purpose of this paper is to investigate the possibility of low temperature Al₂TiO₅ synthesis via a mechanical activation process. After mechanical activation for 60 hours, pure and fine Al₂TiO₅ powders were synthesized through postannealing at temperature range of 1100 ~ 1300 ℃ using activated powders as precursor. The effect of mechanical activation on the phase transformation and grain reduction of Anatase and Corundum was investigated by X-ray diffraction (XRD),thermal analysis (DTA/TGA). The results show that the synthesis temperature of Al₂TiO₅ can be reduced via mechanical activation of the mixture of Anatase and Corundum. The maximum Al₂TiO₅ formation ratio of 98 % can be reached in the case of activation for 60 hours and post-annealing at 1300 ℃ for 1 hour.

Key words: Aluminum Titanate, mechanical activation, X-ray diffraction, synthetic powder