摘要
利用微波辅助-水相共沉淀法,在InCl3和SnCl4混和溶液中添加PEG-6000,并滴加体积比1∶4浓度的氨水,并在不同反应温度(35～75℃)下制备了ITO前驱体,在温度800℃煅烧1h后得到纳米ITO粉体。利用SEM对纳米ITO粉体的形貌进行表征,用XRD对其结构、晶粒度和堆垛层数进行了表征,同时用纳米粒度Zeta电位分析仪对相应颗粒度进行了测试。讨论了微波辅助下不同反应体系温度对制备的纳米ITO粉体的形貌和尺寸的影响,并探讨了其机理,研究结果表明,随着反应体系温度的上升,纳米ITO粉体形貌由球形转为棒形,其晶体结构不变,晶粒粒径和颗粒度随着增大;反应体系温度的升高使纳米ITO晶粒不同晶面的晶粒度不同程度地增大,以及不同晶面垂直方向晶面不同程度地增多,是球形ITO晶粒成为棒形ITO晶粒的基础。
By using microwave-assisted co-precipitation in aqueous phase,adding PEG-6000into the mixture of InCl3solution and SnCl4solution,and adding the ammonia solution with the density（volume ratio）of 1∶4, ITO precursor was prepared at the different reaction system temperatures of 35to 75℃,then ITO nano-powders was obtained after it was calcinated for 1h at the temperature of 800℃.ITO nano-powders’morphology was characterized by SEM and its crystal structure,grain size and piling layers were characterized by XRD,and the matching granularity was determined by Zeta Plus 2002.The effects of different temperature in microwaveassisted reaction system on ITO nano-powders’morphology and its measurements were discussed,and its mechanism was also discussed.The experimental results indicate that as the rise of reacting system temperature,the morphology of ITO particles is transformed from spherical to rod-like one with its crystal structure stable and its grain size or the matching granularity increased.And the rise of reacting system temperature that makes the grain size of ITO nano-crystallites in different crystal face and the numbers of crystal faces in different vertical direction varying increase is the basis of ITO nano-crystallites’morphology transforming from spherical to rod-like one.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2010年第10期1720-1723,共4页
Journal of Functional Materials
基金
国家杰出青年科学基金资助项目(50725416)
湖南省博士后科研专项计划基金资助项目(2008RS4037)
芜湖市科技攻关计划资助项目(2007[15])
关键词
纳米ITO粉体
微波辅助-水相共沉淀法
制备
表征
机理
ITO nano-powders
microwave-assisted co-precipitation in aqueous phase
preparation
characteriza- tion
mechanism
