Sc_2O_3超细粉均相沉淀法的制备及表征  

Synthesis and characterization of Sc_2O_3 ultrafine powder via a homogenous precipitation approach

作　　者：吕滨[1,2] 孙旭东[3] 孙挺[1] 徐敬军[4] 王毅[1] 

机构地区：[1]东北大学理学院,辽宁沈阳110004 [2]锦州钛业有限公司,辽宁锦州121005 [3]东北大学材料与冶金学院,辽宁沈阳110004 [4]中科院金属研究所,辽宁沈阳110016

出　　处：《材料科学与工艺》2012年第1期74-77,82,共5页Materials Science and Technology

基　　金：国家高技术研究发展计划资助项目(863计划)(2007AA06Z116);国家自然科学基金资助项目(50672014)

摘　　要：以(NH4)SO4为沉淀剂和分散剂,Sc(NO4)3为母盐,采用均相沉淀法合成了片状的碱式硫酸钪前驱沉淀物[Sc(OH)SO4].通过差热/热重分析了前驱体的热分解过程,并结合红外光谱、X-射线衍射、透射电镜联用X-射线光电子能谱等测试手段研究了前躯体及煅烧产物的成分、性质.结果表明,由该法制备出的Sc2O3超细粉具有纯度较高、颗粒粒度小(100 nm)、粒度分布均匀、分散性好、近似球形的优异性能.通过水洗-乙醇清洗-丙酮搅拌,结合超声-室温干燥-湿磨等方式处理,对粉体分散性的提高均起到了重要的作用.The basic sulfate scandium precursor [Sc（OH）SO4] which appeared a flaky structure was synthesized using ammonium sulfate as a precipitating agent and scandium sulfate solution as mother liquor via a homogeneous precipitation approach.Thermal decomposition process of the precursor upon calcination was analyzed by DTA/TG.The properties and component of the precursor and calcined powder were investigated by IR,XRD and TEM-EDX.The results showed that the resultant Sc2O3 powder was highly pure,ultrafine（100 nm）,narrow particle size distribution and spherical.Through the process of distilled water,ethanol and acetone washing in combination with ultrasound,drying at room temperature and wet milling during calcination,the dispersion of Sc2O3 powder was greatly improved.

关 键 词：氧化钪 超细粉 硫酸铵 均相沉淀法 碱式硫酸盐 湿磨 

分 类 号：TF123[冶金工程—粉末冶金]