采用凝胶-燃烧法合成了系列稀土掺杂的Sr2MgSi2O7:Eu2+0.02,Ln3+0.04(Ln=La,Ce,Nd,Sm,Gd,Tb,Dy,Ho,Er,Tm)蓝色长余辉发光材料,用X射线粉末衍射(XRD)、扫描电镜(SEM)、荧光分光光度计等对合成产物进行了分析和表征.结果表明:掺杂了不同稀土离子的Sr2MgSi2O7:Eu2+,Ln3+的晶体结构均为四方晶系结构;其激发、发射光谱的峰形、峰位基本无变化,激发光谱为一宽带,最大激发峰位于402nm处,次激发峰位于415nm处,与高温固相法制得的样品相比,激发峰发生了明显的红移;发射光谱也为一宽带,最大发射峰位于468nm附近,是由典型的Eu2+的4f5d-4f跃迁导致的,不同之处在于其激发光谱、发射光谱强度与余辉性质有所差别,其中Dy3+是最理想的共掺杂稀土离子,Sr2MgSi2O7:Eu2+,Dy3+的亮度最高、余辉时间最长,可达5h以上;而Sr2MgSi2O7:Eu2+,Sm3+的发光强度最低,余辉时间最短.
参考文献
| [1] | Chang C K;Mao D L;Shen J F et al.Preparation of long persistent SrO @ 2Al2O3 ceramics and their luminescent properties[J].Journal of Alloys and Compounds,2003,348(1-2):224. |
| [2] | 罗昔贤,于晶杰,林广旭,肖志强,段锦霞,肖志国.长余辉发光材料研究进展[J].发光学报,2002(05):497-502. |
| [3] | 杨云霞;徐志珍;唐泽伸 等.SiO2玻璃涂层的碱土铝酸盐长余焊荧光粉及其制备方法[P].CN 1324910A,2001. |
| [4] | 毛大立,赵莉,常程康,费琴,姜岭.纳米Sr2MgSi2O7：Eu2+,Dy3+的长余辉发光行为[J].无机材料学报,2005(01):220-224. |
| [5] | Geng Xiujuan,Chen Yongjie,QIU Guanming,XIAO Linjiu,Yan Changhao,Sun Yanbin.Synthesis of Long Afterglow Photoluminescent Materials Sr2MgSi2O7∶Eu2+, Dy3+ by Sol-Gel Method[J].稀土学报（英文版）,2005(03):292-294. |
| [6] | Lin YH.;Nan CW.;Zhou XS.;Wu JB.;Wang HF.;Chen DP.;Xu SM. .Preparation and characterization of long afterglow M2MgSi2O7-based (M : Ca, Sr, Ba) photoluminescent phosphors[J].Materials Chemistry and Physics,2003(3):860-863. |
| [7] | Alvani AAS;Moztarzadeh F;Sarabi AA .Preparation and properties of long afterglow in alkaline earth silicate phosphors co-doped by Eu2O3 and Dy2O3[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2005(3/4):147-150. |
| [8] | Kingshey J J et al.Combustion synthesis of fine particle metal aluminates[J].Journal of Materials Science,1990,25:1305. |
| [9] | Katsumata T.;Sasajima K.;Matsuzawa T.;Nabae T. .Growth and characteristics of long persistent SrAl2O4- and CaAl2O4-based phosphor crystals by a floating zone technique[J].Journal of Crystal Growth,1998(3):361-365. |
| [10] | Katsumata T.;Komuro S.;Morikawa T.;Kimura H.;Sakai R. .Growth and characteristics of long duration phosphor crystals[J].Journal of Crystal Growth,1999(Pt.1):869-871. |
| [11] | 张天之,苏锵,王淑彬.MAl2O4：Eu2+、RE3+长余辉发光性质的研究[J].发光学报,1999(02):170-175. |
| [12] | Holsa J.;Lastusaari M.;Niittykoski J.;Jungner H. .Persistent luminescence of Eu2+ doped alkaline earth aluminates, MAl2O4 : Eu2+[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2001(0):326-330. |
| [13] | 孟宪国,王永生,孙力,何志毅,邓朝勇,李海玲.（Eu2+,Nd3+）∶CaAl2O4的长余辉发光及机理的研究[J].光学学报,2003(03):356-360. |
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