掺杂的SrAl_2O_4:Eu_x^(2+),Dy_y^(3+)长余辉粉的合成、表征及发光性质  

Synthesis, Characterization and Fluorescence Property of Doped SrAl_2O_4:Eu_x^(2+),Dy_y^(3+) Long Afterglow Phosphors

作　　者：白健[1] 赵永亮[1] 刘永刚[1] 孙华宁[2] 

机构地区：[1]内蒙古大学,内蒙古呼和浩特010021 [2]东南大学,江苏南京211100

出　　处：《稀有金属材料与工程》2011年第S2期60-63,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(20461002);内蒙古自然科学基金(200711020203)

摘　　要：采用自蔓延高温合成法制备了组成为SrAl2O4:Eu2+x,Dy3+y的2组(x:y=1:1,x:y=1:2)12种铝酸锶长余辉发光粉,测试结果表明,组成为SrAl2O4:Eu2+0.0125,Dy3+0.0125的发光亮度最好。以上述配比为依据,又分别引入了可以用于制备荧光材料的阳离子Li+、Be2+,以及既可以用于制备荧光材料也可以用于制备自激活荧光材料的阳离子Zn2+、Cd2+、Pb2+,共制得5个系列22种铝酸锶(SrAl2O4)长余辉发光粉。Zn2+0.0125的掺杂使得SrAl2O4:Eu2+0.0125,Dy3+0.0125的余辉亮度得到大幅度提高,而且SrAl2O4:Eu2+0.0125,Dy3+0.0125,Zn2+0.0125的衰减速度也明显慢于SrAl2O4:Eu2+0.0125,Dy3+0.0125。X射线衍射结果表明,掺杂少量稀土离子(Eu2+和Dy3+)不会改变SrAl2O4基质的晶体结构。另外,透射电镜分析和粒度分布结果表明,产物为疏松多孔的蘑菇云状固体,粒度在10μm左右。Twelve kinds of doped SrAl2O4:Eu2+x,Dy3+y(x:y=1:1, x:y=1:2) long afterglow phosphors were synthesized by self-propagating high-temperature synthesis method (SHS). The studies show that glow brightness of SrAl2O4:Eu2+0.0125,Dy3+0.0125 is the best. According to the proportion, cations Li+, Be2+ for synthesizing fluorescence material, Zn2+, Cd2+, Pb2+ for synthesizing fluorescence material and self-activated fluorescence material both are separately introduced in the SrAl2O4:Eu2+0.0125, Dy3+0.0125. In total,22 doped SrAl 2 O 4 long afterglow phosphors with 5 series were synthesized by the method. Afterglow brightness of SrAl2O4:Eu2+0.0125 , Dy3+0.0125 can greatly increase because of Zn2+0.0125-doped; furthermore, the rate of afterglow decay of SrAl2O4:Eu2+0.0125 , Dy3+0.0125, Zn 2+ 0.0125 is obviously slower than that of SrAl2O4:Eu2+0.0125 , Dy3+0.0125 , Result of XRD indicates that a little rare-earth ion-doped can not change crystalline structure of substance (SrAl2O4). Moreover, results of TEM and particle size distribution indicate that shapes of products are loose and porous solid that likes mushroom cloud, and the particle size is about 10 μm.

关 键 词：长余辉 铝酸盐 自蔓延高温合成(SHS) 荧光光谱 

分 类 号：O611.3[理学—无机化学]