共沉淀-熔盐焙烧法制备Y_2O_3:Eu及其发光性能的研究  

Preparation of Y_2O_3:Eu Phosphor by Homogeneous Precipitation-Molten Salt Method and Its Luminescent Properties

作　　者：黄燕[1] 胡运生[2] 赵春雷[2] 李萃[2] 叶红齐[1] 庄卫东[2] 

机构地区：[1]中南大学化学化工学院,湖南长沙410083 [2]北京有色金属研究总院稀土材料国家工程研究中心有研稀土新材料股份有限公司,北京100088

出　　处：《中国稀土学报》2007年第2期157-161,共5页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金(50372086);国家科技部973计划(2006CB601104)资助项目

摘　　要：采用共沉淀-熔盐焙烧法制备了Y2O3∶Eu红色荧光粉,研究分析了EDTA、柠檬酸+氨水、淀粉等3类络合剂、沉淀温度及熔盐对其发光性能、粒度及形貌等的影响。研究结果表明:采用柠檬酸+氨水为络合剂、草酸为沉淀剂制备钇铕的草酸盐前驱体,然后加入(Na2CO3+S+NaCl)复合熔盐在1200℃下焙烧2 h即可制得发光强度高出商用粉5%的近球形Y2O3∶Eu。Y2O3：Eu red phosphor was prepared by coprecipitation-mohen salt baking method, and the effects of complexing agents （EDTA, citric acid and ammonia, or starch）, precipitation temperature, and molten salts were investigated on the luminescent properties, particle size and morphology. The results showed that the quasi-spherical Y2O3 ： Eu phosphor can be obtained by selecting citric acid and ammonia as complexing agent, oxalic acid as precipitator to form oxalate precursor, then mixing with molten salts （NaECO3 ＋ S ＋ NaCl） and firing at 1200 ℃ for 2 h, and its luminescent intensity is high 5 % than that of the commercial one.

关 键 词：Y2O3:Eu 熔盐 共沉淀 形貌 发光性能 稀土 

分 类 号：O482.31[理学—固体物理] O614.33[理学—物理]