中文摘要：

以钛酸四丁酯、五水硝酸铋和无水乙酸钠为原料,用溶胶-凝胶法制备Bi0.5Na0.5TiO3（BNT）细粉,通过XRD和TEM表征粉体的结构和形貌。采用正交试验法,分析了反应温度、溶液pH值、加水量对最终BNT粉体粒径的影响。结果表明,各因素对粉体晶粒尺寸影响的显著性水平由大到小依次为加水量〉溶液pH值〉反应温度;反应温度为60℃、溶液pH值为4.5、加水量为7.2mL的条件下制得粉体的平均晶粒尺寸约为200～350nm。

英文摘要：

Bismuth sodium titanate [Bi0.5Na0.5TiO3,BNT] fine powders can be prepared using tetrabutyl titanate,bismuth nitrate pentahydrate and sodium acetate anhydrous as starting materials by sol-gel method.The structure characteristics and microstructure of the synthesized powders were analyzed by XRD and TEM.Applying orthogonal experiment method,the influence of reaction temperature,pH and water volume on the grain size of final BNT powders were analyzed.It was founded that,the primary and secondary sequence affecting the grain sizes of the BNT powders is：water volumepHreaction temperature.The results show that when the reaction temperature is 60℃,value of pH is 4.5 and the water volume is 7.2mL,the grain sizes of the powders is about 200-350nm.