【摘要】 试验分别以微米级Y2O3、Eu2O3粉体为原料,碳酸氢铵为沉淀剂,三乙醇胺为络合剂,采用三乙醇胺络合沉淀法制备了化学组成为NC6H12(NH4)Y2(CO3)(NO3)2·nH2O的前驱体。研究了前驱体在不同的煅烧温度下的物相变化,结果表明,前驱体在500℃保温2h即可直接生成立方相的Eu:Y2O3,在1000℃保温2h的条件下得到了结晶度高、分散性好、平均粒径为50～60nm、近球形的纳米Eu:Y2O3荧光粉。更多还原

【Abstract】 Nanosized Eu:Y2O3 powder were synthesized through the precipitation reaction method by using microsized Y2O3,Eu2O3 as the starting materials,triethanolamine and ammonium hydrogen carbonate as complex agent and precipitant respectively.It was found that the composition of the precursor is NC6Hi2(NH4)Y2(CO3)(NO3)2nH2O.Phase transformations of the precursor were studied during the calcination at different temperatures.Cubic crystal phase Eu:Y2O3 phosphor powder were obtained at 500℃ for 2 h directly.High crystalline,well dispersed and nearly spherical nanosized Eu:Y2O3 powder were synthesized at 1000 ℃ for 2 h by this method,and its average particle size is 50-60 nm.更多还原