文献类型：期刊文献

中文题名：超声沉淀法制备纳米Al_2O_3粉体

英文题名：Al_2O_3 nanopowder prepared by precipitation under ultrasonic radiation

作者：陈雪梅[1];陈彩风[2];陈志刚[2]

机构：[1]华东理工大学超细粉末国家工程研究中心,上海200237;[2]江苏大学材料科学与工程学院,镇江212013

年份：2003

卷号：13

期号：1

起止页码：122

中文期刊名：中国有色金属学报

外文期刊名：The Chinese Journal of Nonferrous Metals

收录：CSTPCD;;Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

基金：江苏省自然科学基金资助项目 (BK2 0 0 0 0 12 ) ;江苏省教委自然科学基金资助项目 (99KJD43 0 0 0 4)

语种：中文

中文关键词：氧化铝;纳米粉末;超声沉淀法;制备

外文关键词：ultrasonic; precipitation; Al 2O 3 nanopowder

摘要：将超声辐射应用于以硫酸铝铵 (NH4Al(SO4) 2 ·12H2 O )和碳酸氢铵 (NH4HCO3 )为原料的沉淀法制备Al2 O3 纳米粉体的化学反应工艺过程 ,制备了粒径为 12nm的α Al2 O3 纳米粉体。通过SEM、TEM等分析手段研究了超声辐射对前驱体NH4Al(OH) 2 CO3 沉淀物及最终粉体尺寸、形貌及其团聚行为的影响 ,并探讨了其作用机理。结果表明 :超声辐射由于其自身的空化作用不仅细化了前驱体颗粒、抑制了其间的团聚 ,而且延缓了其向凝胶的转变过程 ,从而有效地细化α Al2 O3 颗粒 。
The α -Al 2O 3 particle with an average diameter of 1 2 nm was prepared by precipitation method under ultrasonic radiation using NH 4 Al(SO 4) 2·12H 2O and NH 4HCO 3 as raw materials. The effects of ultrasoni c radiation on the size and appearance of precursor and Al 2O 3 particle were investigated by means of SEM and TEM, the mechanism was also studied. The resul ts show that because of the cavitate ultrasonic radiation can not only make the precursor smaller and reduce its agglomeration, but also slow down the speed of change to gel. Ultrasonic radiation can refine α -Al 2O 3 nanoparticle ef fectively, but too high ultrasonic frequency will cause further agglomeration between particles.