关键词: 溶胶-凝胶, 纳米钛酸铅, 钙钛矿型, 晶体结构

Abstract: By using anhydrous Pb(CH₃COO)₂ and Ti(OBu)₄ as raw materials,nano-sized lead titanate (PbTiO₃) powder was prepared by sol-gel process.Structure and characteristics,and morphology of nano-sized PbTiO₃ powder were analyzed by means of XRD,grain test,and SEM etc..At the same time,different factors affecting the sol-gel process were discussed.Results showed that the factors,such as alcohol,hydrolysis temperature，C₃H₈O₃,and heat treatment temperature had obvious influence on sol-gel process,especially,in which the reaction temperature was the most important factor for the gelation time.Perovskite-type PbTiO₃ was formed at heat treatment temperature of 450 ℃.With the increase of heat treatment temperature,the phase composition of PbTiO₃ powder was also changed.Highly crystallized,53.7 nm of average grain size,well-distribted nano-sized PbTiO₃ powders were obtained by heating dry PbTiO₃ gel at 600 ℃ for 2 h. 

Key words: sol-gel, nano-sized lead titanate, perovskite-type；crystal structure