中文摘要：

首先采用熔盐法合成出铋层状结构的Bi_4Ti_3O_（12）和Na_（0.5）Bi_（4.5）Ti_4O_（15）籽晶,再分别以其作为前驱体,通过拓扑化学反应在900～1100℃合成了片状、各向异性的Na_（0.5）Bi_（0.5）TiO_3晶粒。通过XRD,SEM分析方法,研究了模板前驱体对Na_（0.5）Bi_（0.5）TiO_3晶粒相结构和微观形貌的影响,并讨论了其形成机理。结果表明：前驱体晶胞的不同造成Na_（0.5）Bi_（0.5）TiO_3粒径大小和形貌的差异。

英文摘要：

As the precursors of Na_（0.5）Bi_（0.5）TiO_3,bismuth-layer-structured Bi_4Ti_3O_（12） and Na_（0.5）Bi_（4.5）Ti_40_（15） particles were rst synthesized by molten salt process.After the topochemical reaction with the complementary reactants in NKCl flux,the pure plate-like Na_（0.5）Bi_（0.5）TiO_3 particles were prepared by both Bi_4Ti_3O_（12） precursor and Na_（0.5）Bi_（4.5）Ti_40_（15） precursor at 800～1100℃.The effects of precursors on phase structure and microstructure were researched by means of XRD and SEM.The morphology and scale of Na_（0.5）Bi_（0.5）TiO_3 showed notable difference may be attributed to the content and morphology of Bi_4Ti_3O_（12） and Na_（0.5）Bi_（4.5）Ti_40_（15） particles phase which are different by different precursors.