Sr_(2-x-y)Ca_xMg_yAl_2SiO_7∶Eu^(2+)发光材料的制备及性能研究  

Preparation and Characterization of Sr_(2-x-y)Ca_xMg_yAl_2SiO_7∶ Eu^(2+)

作　　者：赵永旺[1,2] 苏全帅 张超[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

出　　处：《稀土》2016年第3期85-89,共5页Chinese Rare Earths

基　　金：国家自然科学基金项目(51474133)

摘　　要：采用溶胶凝胶-燃烧法合成Sr_(2-x-y)Ca_xMg_yAl_2SiO_7∶Eu^(2+)稀土长余辉发光材料,通过TG-DTA、XRD、SEM和荧光光谱分析等方法,研究了材料的结构、颗粒形貌和发光性能,并对Ca^(2+)、Mg^(2+)、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,适量掺杂Ca^(2+)、Mg^(2+)、Eu^(2+)后,基质的晶格结构并未发生变化,为Sr_2Al_2SiO_7晶粒,粒径在1 um^4 um,其激发光谱是位于峰值340 nm^360 nm的宽带谱,发射光谱峰值位于460 nm^480 nm。掺杂Ca^(2+)、Mg^(2+)后发光强度得到提高,镁元素的掺杂可引起发射波长向长波方向移动,而钙元素掺杂可引起发光强度的增大。影响材料发光性能的主要因素是钙,其次是铕,在实验条件下当Ca^(2+)的掺杂量为0.2,Mg^(2+)的掺杂量为0.1,Eu^(2+)的掺杂量为0.04时发光强度为最大,其发射光谱峰值位于469 nm处,最大发射光谱强度达到了8500。Sr2-x-yCaxMgyAl2SiO7∶Eu2＋ long afterglow phosphors were synthesized by SOL- GEL- combustion reduction method. The crystal structure morphology and the luminescent properties of the samples were characterized and measured by u- sing the method of TG - DTA, XRD , SEM and fluorescence analysis, respectively. The effects of mole content of Sr2-x-yCaxMgyAl2SiO7∶Eu2＋ on the luminescence properties of the Sr2-x-yCaxMgyAl2SiO7∶Eu2＋ sample were discussed. The results showed that the sample has a single Sr2 A12 SiO7 phase and good crystalline state, and its crystalline grain size is about 1 ～ 4 um. The excita- tion spectra are located in 340 ~ 360 nm, emission spectra are located in 360 -380 nm. Under the experimental condition, the luminous intensity reaches the maximum value when the Ca2＋ doping amount is 0.2, Mg2＋ doping amount is 0.1 and the Eu2. doped amount is 0.04, the emission spectrum peak is located at 469 nm, and maximum emission spectrum intensity reached 8500.

关 键 词：溶胶凝胶 铝硅酸盐 发光材料 

分 类 号：O482.31[理学—固体物理]