Eu²⁺、Dy³⁺、La³⁺+掺杂铝酸盐制备长余辉发光材料研究

Eu²⁺, Dy³⁺, La³⁺ Doped Aluminum Acid Preparation Study of Long Afterglow Luminescent Materials

本研究以Eu2+、Dy3+、La3++掺杂九水合硝酸铝、硝酸锶,硼酸为助熔剂,尿素为还原剂、燃烧剂,在600℃~610℃下低温燃烧法合成黄绿色SrAl2O4:Eu2+、Dy3+、La3++长余辉发光材料;主要研究Eu2+、Dy3+、La3++稀土元素掺杂量,硼酸、尿素添加量对样品余晖时长的影响。结果得出:在尿素/硝酸盐为两倍,硼酸用量为20%,Eu/Dy/La = 1:1:1时,制备的SrAl2O4:Eu2+、Dy3+、La3++长余辉材料发光强度和余晖时间最佳。

In this paper, the yellow-green color SrAl2O4:Eu2+: Eu2+, Dy3+, La3+ long afterglow luminescent material was synthesized by low-temperature combustion method at 600˚C~610˚C with Eu2+, Dy3+, La3+ dop-ing aluminum nitrate nonahydrate and strontium nitrate, boric acid as flux and urea as reducing agent and incendiary agent;and discuss the influence of Eu2+, Dy3+ and La3+ rare earth elements doping amount and urea borate addition amount on the residual light duration of samples. The results show that the best luminescence intensity and afterglow time of SrAl2O4:Eu2+: Eu2+, Dy3+, La3+ were obtained when urea/nitrate was twice, the amount of boric acid was 20% and Eu/Dy/La was 1:1:1.