模板前驱体对熔盐法制备Na_(0.5)Bi_(0.5)TiO_3片状晶粒的影响  

INFLUENCES OF DIFFERENT TEMPLATES PRECURSORS ON Na_(0.5)Bi_(0.5)TiO_3 PARTICLES PREPARED BY MOLTEN SALT METHOD

作　　者：赵戈[1] 江向平[1] 舒凯征[1] 陈超[1] 涂娜[1] 

机构地区：[1]景德镇陶瓷学院材料科学系江西省先进陶瓷材料重点实验室,景德镇333001

出　　处：《中国陶瓷》2011年第12期27-29,34,共4页China Ceramics

基　　金：江西省自然科学基金(2010GQW0057;2010GQW0058);江西省高等学校"先进陶瓷材料"科技创新团队;江西省教育厅项目(GJJ10027;GJJ11196;GJJ11197;GJJ10226)

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。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.

关 键 词：熔盐法 铋层状 前驱体 钛酸铋钠 

分 类 号：TM282[一般工业技术—材料科学与工程]