水热法制备纳米Na_(0.5)Bi_(0.5)TiO_3粉体  

Hydrothermal Synthesis of Na_(0.5)Bi_(0.5)TiO_3 Nano-powders

作　　者：苗鸿雁[1] 朱刚强[1] 周耀辉[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,陕西咸阳712081

出　　处：《电子元件与材料》2004年第11期16-19,共4页Electronic Components And Materials

基　　金：国家自然科学基金资助项目(50372039)

摘　　要：采用Bi(NO3)3?5H2O、Ti(OC4H9)4为原料,在水热条件下研究了影响Na0.5Bi0.5TiO3(BNT)晶体生长和形成的各个影响因素,诸如:水热反应的温度、时间,NaOH浓度以及原料的种类等.实验结果表明,反应温度在160～180℃,保温时间在4～24 h,NaOH浓度为4～12 mol/L时,能制备出纯净的、立方形的纳米Na0.5Bi0.5TiO3晶体,其颗粒线度尺寸为15～55 nm.若温度低于160℃,Na0.5Bi0.5TiO3结晶程度低;若高于180℃,易形成Bi4Ti3O12.当NaOH浓度低于4 mol/L时,Na0.5Bi0.5TiO3晶相少,主要呈Bi4Ti3O12;当其高于12 mol/L时,产物主要是非晶态物质.The effects of processing parameters on the growth and morphology of hydrothermally derived Na0.5Bi0.5TiO3 (BNT) powders were investigated by using Ti(OC4H9)4 and Bi(NO3)3?5H2O compounds as raw materials. The experimental results show that the purity BNT phase is obtained when the NaOH concentration is about 4~12 mol/L and the reaction temperature is about 160~180℃ for 4~24 h. The sizes of the cubic particles are about 15~55 nm with a typical of Na0.5Bi0.5TiO3 structure.

关 键 词：无机非金属材料 水热合成 粉体 钛酸铋钠 

分 类 号：TM282[一般工业技术—材料科学与工程]