水热法制备钛酸铋粉体的研究

Study on Bi_4Ti_3O_(12) Powder Prepared by Hydrothermal Method

以TiCl4乙醇溶液和Bi（NO3）3·5H2O为原料．NaOH为矿化剂，其摩尔配比的关系为TiCl：Bi（NO3）3·5H2O：NaOH=0．1：0．75：1．5．用水热法合成钙钛矿结构的钛酸铋粉体。讨论了水热合成条件（前驱物和粉体处理、晶化时间、填充率）对钛酸铋粉体结构和形貌的影响。XRD、SEM分析表明，在240℃，晶化时间16h，填充比为60％的条件下，可制备平均晶粒粒径为9～12nm，团聚较轻，颗粒边界明显．球形的钛酸铋粉体。

This paper took Bi（NO3 ）3： 5HzO,TiCI4 and NaOH solution as raw materials, there is such a mol percentage： TiCI4 ：Bi（NO3）3： 5H2O： NaOH=0.1 ： 0.75 ： 1.5, hydrothermally synthesizing Bi4Ti3O12 particles of perovskite structure. The influences of hydrothermal condition（precursor powder process, reaction time and filling ratio） on crystal structure and morphologies of Bi4 Ti3 O12 particles were discussed. The XRD results and SEM microphotographs show that under the conditions of 240 ℃,16 h reaction time and 60% filling ratio Bi4 Ti3O12 particles can be synthesize ,and their average particle diameter is 9-12 nm,glomeration is less and thereis an apparent borderline, Bi4 Ti3 O12 powder has aball structure.