稀土硅酸盐长余辉发光材料的制备及性能  

Preparation and Properties of Rare Earth Silicate Long Afterglow Luminescent Materials

作　　者：周永强[1] 刘海涛[1] 田一光[1] 尹德武[1] 张景峰[1] 梁晓娟[1] 

机构地区：[1]温州大学,浙江温州325035

出　　处：《稀有金属材料与工程》2010年第S2期512-515,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(20771086)资助项目

摘　　要：以SrCO3、CaCO3、4MgCO3·Mg(OH)2·5H2O、SiO2等为原料,用高温固相烧结法合成了发光性能良好的Sr2-xCaxMgSi2O7:Eu2+,Dy3+长余辉发光材料,借助于X射线衍射和荧光光谱等研究手段对其进行了分析和表征,探讨了Ca2+取代Sr2+和稀土离子的掺入量及固相反应温度、时间对其发光性能的影响。结果表明:Sr2-xCaxMgSi2O7:Eu2+,Dy3+长余辉发光材料的较佳烧成温度为1250～1300℃,烧成时间为3h左右;其物相单一,只含有与四方晶系的Sr2MgSi2O7晶相相同的固溶体Sr2-xCaxMgSi2O7相;紫外光和日光均可使其激发发光,随着钙取代锶量的增大,其发射峰逐渐向长波方向移动,发光颜色由蓝绿色变成黄色,但其发光性能变差。钙的取代量为0.5mol以下样品的发光性能良好,余辉时间可达13h以上。Sr2-xCaxMgSi2O7: Eu2+,Dy3+ long afterglow luminescent materials were synthesized by high temperature solid-state reaction method using SrCO3, CaCO3, 4MgCO3?Mg(OH)2?5H2O, SiO2 as the raw materials. The effect of Ca2+ replacing Sr2+, the mixing amount of rare earth ions, solid state reaction temperature and time on luminescent properties of the materials was discussed. The materials were characterized by X-ray diffraction, fluorescence spectrum and so on. The results show that the better sintering temperature and time of the materials is 1250-1300 ℃ and 3 h. respectively. It has a single phase — the solid solution phase Sr2-xCaxMgSi2O7. The ultraviolet ray and the sunlight may cause its stimulated luminescence. With increasing quantity of substituting for Sr with Ca, the emission peak gradually move to the long wave, luminous color change from blue-green to yellow, but its luminescent properties deteriorate. The luminescence properties of the sample in which the substitution quantity of calcium is 0.5 mol are better and its luminescent persistence time last more than 13 h.

关 键 词：硅酸盐 长余辉 发光材料 高温固相烧结法 

分 类 号：O614[理学—无机化学]