碳酸氢铵沉淀法制备二氧化铈超细粉体-北京大学学报医学版.PDF

23 1 矿　冶　工　程 Vol.23 №1 2003 02 MINING AND META URGICA ENGINEERING February 2003 肖楚民, 潘湛昌, 张环华, 李秀珍, 黄慧民 ( , 510090) 　:。X , 300～900 ℃, , 。, 。0.25 ～0.3 mol/L, 0.2～0.4 mol/L,pH 7～8, 60～80 ℃, 600 ℃, 20 nm, 。 :;;; Preparation of Ultrafine Powders CeO Using Precipitation Method 2 XIAO Chu-min, PAN Zhan-chang ,ZHAN Huan-hua,LI Xiu-zhen, HUAN Hui-min (Faculty of Chemical Engineering and Light Ind ustry , Guangdong University of Technology , Guangzhou 510090, Guang - dong , China ) Abstract:Ultrafine CeO powder was prepared using NH HCO as precipitating agent.The results of X-ray diffraction show 2 4 3 that CeO nanometer crystals obtained at 300～900 ℃are cubic crystals, of which the mean size increases with the roasting 2 temperature.The weightlessness rate of the sample depends mainly on its roasting temperature.At a reactant concentration of 0.25～0.3 mol/L, a precipitatant concentration of 0.2～0.4 mol/L, a solution pH of 7～8, a precipitation temperature of 60 ～80 ℃and a roasting temperature of 600 ℃, ultrafine CeO powders can be preparedwith amean size of 20 nm and good 2 dispersibility. Key words:ultrafine powder;rare earth;cerium dioxide;precipitation method 　　1～100 nm , , [1] 。 , 。 ,,, , 0.1 μm , ,,。 ,、、 , , [2] ,、、、、 ,、、、- , 。 。, , , , , 3μm , ,、、、、、 , , 。 , 、 [3] ,,