凝胶-水热法制备纺锤形TiO_2粉体  

SYNTHESIS OF SPINDLE TYPE TITANIA PARTICLES BY THE GEL-HYDROTHERMAL PROCESS

作　　者：吴孟强[1] 张其翼[2] 陈艾[1] 马银铃 

机构地区：[1]电子科技大学微电子与固体电子学院,成都610054 [2]四川大学化工学院,成都610065 [3]河南省洛阳市电话设备厂,河南洛阳471013

出　　处：《硅酸盐学报》2002年第1期108-111,共4页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金项目 ( 5 0 0 82 0 0 1)

摘　　要：以钛酸四丁酯 (TBT)和三乙醇胺 (TEOA)为主要原料 ,配制其摩尔比为 1∶2的均匀溶液 ,于 10 0℃处理 8～ 12h ,获得无色透明的凝胶 ;凝胶在 14 0～ 15 0℃陈化 48～ 72h生成TiO2 粉体 .采用X射线衍射、透射电镜等方法对所得粉体进行了表征 .实验主要研究了凝胶化过程、氨用量等条件对产物形貌和尺寸的影响 .研究结果表明 ,采用这种凝胶 -水热法可合成平均长径比为 4∶1,均匀分散的纺锤形TiO2A homogeneous mixture of tetrabutyl titanate (TBT) and triethanolamine (TEOA) was used as source materials ( at molar ratio 1∶2 ). It was aged for 8 to 12 h at 100 ℃ to form a highly viscous transparent gel. Titanium dioxide particles were synthesized by means of hydrothermal crystallizing of the gel at 140-150 ℃ for 48-72 h. The as_prepared particles were characterized by XRD and TEM. The influence of the aging process for gelatination and the ammonia concentration on the shape and size of the as_prepared titanium dioxide particles was mainly investigated. It is showed that uniform spindle titanium dioxide particles in an average aspect ratio of 4∶1 can be obtained by the presented gel-hydrothermal process.

关 键 词：凝胶-水热法 纺锤形 水热处理 二氧化钛粉体 锐钛矿 纺锤形粒子 

分 类 号：TQ134.11[化学工程—无机化工]