CaAl_2O_4:Eu^(2+),Nd^(3+)纳米粉体的合成与发光性质

Preparation and Characterization of CaAl_2O_4:Eu^(2+),Nd^(3+) Nanoparticles

采用溶胶-凝胶法制备了CaAl2O4:Eu2+,Nd3+纳米粉体发光材料。利用DTA,TG,XRD,SEM,光谱分析等手段对样品进行了结构和性能分析。实验结果表明,800℃烧结的样品形成已CaAl2O4晶相,样品平均晶粒尺寸为20~40 nm,与CaAl2O4:Eu2+,Nd3+粗晶材料相比,样品的发光光谱发生了“蓝移”,热释光峰值向高温移动了96℃,且曲线形状变宽,发光衰减是由初始的快衰减和随后的慢衰减构成,发光余辉时间5 h。

Long persistent phosphoresceoce CaAlO4：Eu^2＋,Nd^3＋nanoparticles were synthesized through sol-gel method. The structures and properties of the samples were analyzed by DTA, TGA, XRD, TEM and spectrometer. Results indicated that the CaAl2O4 crystalline phase was formed at 800℃. The particles are spherical in shape and about 20-40 nm in size. The peaks of the excitation, emission and thermoluminescence spectra shift compared with the CaAlO4：Eu^2＋,Nd^3＋ coarse crystals. The luminescence decay includes a initial rapid part and a following slow part. The decay time lasts for about 5 h.