JIANG  Weihui ^1,2 FENG  Guo ¹ LIU  Jianmin ¹ ZHU Qingxia ¹ JIANG  Qiming ¹

(1. School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen Jiangxi 333403, China; 2. Key

Laboratory of Advanced Ceramics of Jiangxi Province, Jingdezhen Jiangxi 333001, China)

Abstract:Aluminum titanate films coated on mullite substrates were prepared via sol-gel method, using tetrabutyl titanate(Ti (OC₄H₉)₄) and aluminum nitrate (Al (NO₃)₃·9H₂O) as precursors, ethanol as solvent and crystallization water in aluminum nitrate instead of additional water required for hydrolysis reaction. The effects of pulling speed, dipping time, coating times on the quality of aluminum titanate films coated on mullite substrates were studied by means of polarizing microscope, SEM and XRD. The results show that when pulling speed is 1mm/s, the dipping time is 30s, uniform, compact aluminum titanate films with high quality can be prepared on the surface of mullite substrates by coating for three times via dip-coating method.

Keywords:sol-gel method, aluminum titanate, film, mullite