Sr2Al2SiO7∶Eu2＋发光材料制备及性能研究  

Preparation and Characterization of Sr_2Al_2SiO_7∶Eu^(2+)Photoluminescence Materials

作　　者：赵永旺[1,2] 王景甫[3] 白智韬[2] 郑坤灿[2] 安胜利[2] 

机构地区：[1]北京科技大学,冶金与生态工程学院,北京100083 [2]内蒙古科技大学,材料与冶金学院,内蒙古包头014010 [3]北京工业大学,环境与能源工程学院,北京100124

出　　处：《稀土》2015年第6期57-61,共5页Chinese Rare Earths

基　　金：国家自然科学基金项目(51474133);国家重点基础研究发展(973)计划(2012CB720402)

摘　　要：采用溶胶凝胶-燃烧还原法在1100℃,p H 3~4的条件下制取了Eu^(2+)掺杂铝硅酸锶发光材料,通过TG-DTA、XRD和荧光光谱分析等方法,研究了材料的结构和发光性能,并对Eu^(2+)不同掺杂浓度下的发光性能进行了对比研究。结果表明,样品干凝胶的分解可以分为熔化、有机物的分解及Sr_2Al_2SiO_7∶Eu^(2+)晶相的生成三个阶段,1100℃所有反应完全;Sr_2Al_2SiO_7∶Eu^(2+)发光材料属于正方晶系晶体结构,其激发光谱是位于峰值344 nm^350nm的宽带谱,发射光谱峰值位于455 nm,最大发射光谱强度为7500 mcd;Eu2+掺杂浓度对其发光性能影响较大,在实验条件下掺杂摩尔浓度为0.04时激发光谱和发射光谱强度均达到最大。Eu2＋doped Sr2A12SiO7 luminescent materials were prepared by sol- gel -combustion reduction method under the condition that the reaction temperature is 1100 ℃ and the pH is 3 to 4. The crystal structure and the luminescent properties of the samples were characterized and measured by using the method of TG - DTA, XRD and fluorescence analysis. , respec- tively. The results showed that Sr2A12 SiOT： Eu2＋ luminescence materials exhibited tetragonal system crystal structure, and its excitation spectra was a broadband spectrum located at 344 and 350 nm. The emission spectrum is located at 455 nm, the maximum luminous intensity is 7500 med; The Eu2＋ doped concentration had large effects on luminescent properties of the prepared material. The intensity of excitation and emission spectrum arrived at the maximum when doped molar concentration was 0.04.

关 键 词：燃烧法 溶胶凝胶 铝硅酸盐 长余辉发光材料 

分 类 号：O482.31[理学—固体物理]