沉淀工艺对合成BaAl_(12)O_(19):Mn^(2+)绿色荧光粉性能的影响  

Effect of chemical co-precipitation process on performance of BaAl_(12)O_(19):Mn^(2+) phosphor

作　　者：韩学林[1] 董岩[1] 沈超[1] 陈蓉[1] 邵起越[1] 蒋建清[1] 

机构地区：[1]东南大学材料科学与工程学院江苏省先进金属材料高技术重点实验室,江苏南京211189

出　　处：《功能材料》2009年第9期1436-1438,1441,共4页Journal of Functional Materials

基　　金：高等学校科技创新工程重大项目培育基金资助项目(707029);基础研究计划(自然科学基金)资助项目(BK2008317)

摘　　要：用化学共沉淀法制备出BaAl12O19:Mn2+绿色荧光粉,并研究了沉淀工艺参数对该荧光粉性能的影响。结果表明,通过严格控制pH值等共沉淀条件,可以获得Al3+、Ba2+、Mg2+、Mn2+离子的完全沉淀,并使其中的Al3+以结晶碳酸铝铵形式沉淀,沉淀产物经1200℃×1h煅烧后得到松软超细粉体;调节料液中Mg的掺杂量,制备出单相BaAl12O19:Mn2+荧光粉;料液滴加速度,陈化时间对荧光粉的颗粒大小和形貌有很大影响,通过试验给出了最佳滴加速度及陈化时间范围;该荧光粉的发光性能与商用荧光粉相当,粒度可控制在1～2μm。BaAl12O19：Mn^2＋ green phosphor was synthesized by chemical co-precipitation method. Complete coprecipitation of Al^3＋ , Ba^2＋ , Mg^2＋ and Mn^2＋ was achieved by controlling the conditions of precipitation, especially the pH value of the system. And the form of Al^3＋ precipitates was controlled to be crystalline ammonium aluminum carbonate hydroxide（AACH）, ultrafine powders were obtained by sintered at temperature 1200℃ for 1h. The amount of magnesium-doped was controlled to obtain the single phase BaAl12O19：Mn^2＋. The optimized dropping rate and assembly time which had great influence on the shape and the size of the phosphors, was abtained . The phosphor had reached the practical level.

关 键 词：BaAl12O19:Mn^2+ 化学共沉淀法 荧光粉 PDP 

分 类 号：TQ628.2[化学工程—精细化工] TN104.3[电子电信—物理电子学]