乙二胺四乙酸二钠模板调控碳酸铈粒子形貌的研究  

Study on Control of Morphology of Cerium Carbonate by Ethylenediamine Tetraacetic Acid Disodium

作　　者：徐良 胡艳宏[1,2] 李梅[1,2] 柳召刚 王觅堂[1,2] 张晓伟[1,2] 田甜[1,2] XU Liang;HU Yan-hong;LI Mei;LIU Zhao-gang;WANG Mi-tang;ZHANG Xiao-wei;TIAN Tian(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,China;Key Laboratory of Green Extraction&Efficient Utilization of Light Rare-Earth Resources of Ministry of Education,Baotou 014010,China)

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010 [2]轻稀土资源绿色提取与高效利用教育部重点实验室,内蒙古包头014010

出　　处：《稀土》2019年第5期84-90,共7页Chinese Rare Earths

基　　金：国家自然科学基金项目(21666029,21066010);教育部创新团队项目(IRT1065);内蒙古自然科学基金项目(2016MS0223);草原英才培养项目

摘　　要：以硝酸铈(Ce(NO3)3)为原料,碳酸氢铵(NH4HCO3)为沉淀剂,乙二胺四乙酸二钠(EDTA-2Na)为模板剂,通过控制EDTA-2Na与Ce^3+摩尔百分比,加料时间,搅拌速度和陈化时间实验条件,制备得到规则块状形貌的碳酸铈。并采用SEM、FT-IR对制得的产品进行分析表征。结果表明,制备形貌规则、分散性较好的Ce2(CO3)3的最佳条件:EDTA-2Na与Ce^3+的摩尔百分比为0.2,加料时间为3 h,搅拌速度为300 r/min,陈化时间为8 h时。同时初步分析探讨了EDTA-2Na控制Ce2(CO3)3的形貌机理。Cerium nitrate(Ce(NO3)3)was used as raw material,ammonium bicarbonate(NH4HCO3)as precipitant and EDTA-2 Na as template agent.Cerium carbonate was prepared by controlling the mole percentage ratio between EDTA-2 Na and Ce^3+,feeding time,stirring speed,aging time and other experimental conditions.SEM and FT-IR were used to analyze the products.The results showed that under the conditions of mole ratio between EDTA-2 Na and of Ce^3+0.2,feeding time 3 h,stirring speed 300 r/min and aging time 8 h,Ce2(CO3)3 with better morphology and dispersity was obtained.At the same time,Ce(CO3)3 morphology control mechanism of EDTA-2 Na was discussed.

关 键 词：乙二胺四乙酸二钠 模板 碳酸铈 机理 

分 类 号：TF123.25[冶金工程—粉末冶金] TQ133.3[冶金工程—冶金物理化学]