摘要
采用柠檬酸燃烧法制备了稀土Tb3+掺杂的CaLa1-xAl3O7∶xTb3+发光材料的前驱粉末,在低于700℃退火处理时,得到非晶态样品,而高于800℃退火处理后为纯相的CaLa1-xAl3O7∶xTb3+粉末样品。通过三维荧光光谱、激发光谱和发射光谱研究了Tb3+在CaLaAl3O7基质中的发光性能及Tb3+掺杂量、退火温度和柠檬酸与金属离子的配比等对发光强度的影响。结果显示,非晶态和晶态CaLa1-xAl3O7∶xTb3+样品都可发光,在240nm波长光的激发下,CaLaAl3O7∶Tb3+粉体产生Tb3+的特征发射峰,归属于5D4-7FJ(J=6,5,4,3)跃迁,主发射峰位置均在543nm处(5D4-7F5跃迁),随着粉末逐渐成相5D4-7F5跃迁明显增强。
Using the citric acid-combustion method the precursor of CaLaAl3O7：xTb3＋ was prepared. When annealing below 700 ℃, the materials were in amorphous state, when annealing temperature is above 800℃, the high purity CaLaAl3O7：xTb3＋ crystalline materials were obtained. The effect of co-doping of Tb3＋ ion annealing temperature and the molar proportion of citric acid and metal ion （C/M） on the luminescence properties of CaLaAl3O7：xTb3＋ in amorphous and crystalline both have been investigated. The results indicate that the band of Tb3＋ at 240 nm corresponding to 5D4-TFj （J=6, 5, 4, 3） transition of Eu3＋ ion. The main band is at 543 nm corresponding to 5D4-TF5 transition.With the crystalline materials formation, the 5D4-TF5 transition increases remarkably.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2008年第8期1331-1334,共4页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.20161001)
内蒙古自治区自然科学基金(No.200711020213)资助项目
作者简介
通讯联系人。E-nrail：sr@imnu．edu．cn：sarenqindamuni@sohu．com第一作者：莎仁，女，44岁，副教授；研究方向：稀土发光材料。
