晶化时间对水热法制备钛酸铋纳米粉体的研究  

The investigation of reaction time on the formation of Bi_4Ti_3O_(12) nanoparticles by the hydrothermal synthesis

作　　者：杨群保[1] 李永祥[1] 殷庆瑞[1] 王佩玲[1] 程一兵 

机构地区：[1]中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室,上海200050

出　　处：《功能材料》2004年第5期585-587,共3页Journal of Functional Materials

基　　金：国家高技术研究发展计划(863计划)基金资助项目(2001AA325070);国家重点基础研究发展计划(973计划)资助项目(2002CB613307)

摘　　要：　采用分析纯Bi(NO3)3·5H2O和TiCl4为原料,以NaOH为矿化剂,在反应温度为230℃的水热条件下,研究了晶化时间对Bi4Ti3O12物相结晶性能的影响。XRD表明在晶化时间不少于240min的条件下,才能合成纯的Bi4Ti3O12单一物相,并随着晶化时间的延长,Bi4Ti3O12的晶粒有所长大。通过红外光谱、比表面积和TEM等性能表征,探讨了钛酸铋的水热合成机理,用原位生成机理和溶解 再结晶机理解释了钛酸铋的水热生长过程。Bi_4Ti_3O_(12) nanocrystalline particles were hydrothermally synthesized at 230℃, for 240min at least, from Bi(NO_3)_3·5H_2O, TiCl_4 and NaOH solution. The XRD results revealed that the crystallinity of Bi_4Ti_3O_(12) particles were improved with rising reaction time. Through the FTIR spectra, BET and TEM characterization, The hydrothermal formation of Bi_4Ti_3O_(12) nanoparticles was elucidated with in-situ growth and dissolution-recrystallization mechanisms.

关 键 词：水热合成 BI4TI3O12 晶化时间 纳米粉体 

分 类 号：O782.2[理学—晶体学] TQ174.75[化学工程—陶瓷工业]