自蔓延高温合成掺杂SrAl_2O_4稀土长余辉发光粉的研究

Study on Self-Propagating Synthesis of the Doped SrAl_2O_4 Rare Earth Long Afterglow Phosphors

在600℃下用自蔓延高温法制备了SrAl2O4：Eu02.＋012 5,RE03.＋012 5（RE3＋=Ce3＋,Pr3＋,Nd3＋,Tb3＋,Dy3＋）,SrAl2O4：Eu02.＋012 5,M0.012 5（M=Li＋,Be2＋,Cd2＋,Mn2＋,Cu2＋,Ag＋,Zn2＋,Pb2＋）,SrAl2O4：Eu02.＋012 5,Dy03.＋012 5,M0.012 5（M=Mn2＋,Cu2＋,Ag＋,Zn2＋）及SrAl2O4：Eu02.0＋12 5,Dy03.＋012 5,RE03.＋012 5（RE3＋=Ce3＋,Pr3＋,Nd3＋,Tb3＋）四个系列21种掺杂的铝酸锶（SrAl2O4）稀土长余辉发光粉。反应得到的产物疏松多孔,有很强发射峰位于514 nm附近,激发光谱为290~360 nm的宽带激发峰,Dy3＋对余辉时间影响最明显,Tb3＋对发光强度影响最大,组成为SrAl2O4：Eu02.＋012 5,Dy03.＋012 5的发光粉的发光强度及余辉时间较好,掺入锌离子后形成SrAl2O4：Eu02.＋012 5,Dy03.＋012 5,Zn02.＋012 5可显著提高初始余辉亮度。

Twenty one doped SrAl2O4 long after-glowed phosphors with 4 series were synthesized by self-propagating high-temperature synthesis method（SHS） with urea-nitrate solution which served as media at 600 ℃.They are SrAl2O4∶Eu2＋0.012 5,RE3＋0.012 5（RE3＋=Ce3＋,Pr3＋,Nd3＋,Tb3＋,Dy3＋）,SrAl2O4∶Eu2＋0.012 5,M0.012 5（M=Li＋,Be2＋,Cd2＋,Mn2＋,Cu2＋,Ag＋,Zn2＋,Pb2＋）,SrAl2O4∶Eu2＋0.012 5,Dy3＋0.012 5,M0.012 5（M=Mn2＋,Cu2＋,Ag＋,Zn2＋）,and SrAl2O4∶Eu2＋0.012 5,Dy3＋0.012 5,RE3＋0.012 5（RE3＋=Ce3＋,Pr3＋,Nd3＋,Tb3＋）, of which luminescence and after-glowing features were tested.The morphology of all these samples presents a state of porosity and laxity.The samples show an intense emission peak at 514 nm and broad peaks of the excitation spectra at 290～360 nm,Tb3＋ and Dy3＋ had most effects on luminance and after-glowed time respectively.The SrAl2O4∶Eu2＋0.012 5,Dy3＋0.012 5 had good luminance and proper after-glowed time as well.