CaO-SiO_2-B_2O_3玻璃中Sm^(3+)的发光性质  

Luminescent Properties of CaO-SiO_2-B_2O_3 Glasses Doped with Sm_2O_3

作　　者：石鹏途[1] 舒万艮[1] 于健[1] 吕兴栋[1] 

机构地区：[1]中南大学化学化工学院,湖南长沙410082

出　　处：《稀土》2005年第6期8-11,共4页Chinese Rare Earths

基　　金：湖南省自然科学基金项目资助(02JJY2020)

摘　　要：用常规的高温合成法合成了C aO-S iO2-B2O3-Sm2O3玻璃,探讨了玻璃的最佳合成温度、玻璃的吸收光谱并研究了其发光性质。在C aO-S iO2-B2O3-Sm2O3玻璃体系中观察到了Sm3+的发射光谱。样品的发射光谱有三个主要荧光发射峰,峰值波长分别为568nm、605nm、650nm,其中最强峰为605nm,这些荧光峰均为线状峰,可见发射起源于Sm3+4f电子的f-f跃迁。其中568nm对应于4G5/2→6H5/2跃迁、605nm对应于4G5/2→6H7/2跃迁、650nm对应于4G5/2→6H9/2跃迁,光谱性质表明这种玻璃体系能够把太阳光中的紫外光转换成红光,从而增强红光的发射强度。可以利用这些玻璃的发光性质来制备农用转光玻璃。CaO-SiO2-B2O3-Sm2O3 glasses were synthesized in air atmosphere with conventional high temperature process. The optimal temperature of synthesis, the absorption spectrum and the luminescent properties of the glasses were studied. The fluorescence spectrum of Sm^3＋ was observed in CaO-SiO2-B2O3-Sm2O3 glasses. The fluorescence spectrum of the sample has three major emission bands peaking at 568nm, 605nm and 650nm,respectively. The strongest emission band peak is at 605nm. These fluorescence emission bands are all sharp linear bands, not broad zonal bands. Therefore, we can conclude that the emissions are caused by the f-f transition of the 4f electrons of Sm^3＋. The emission bands peaking at 568nm, 604nm and 650nm correspond to the ^4G5/2→^6H5/2 transition,^4 G5/2→^6H7/2 transition and ^4G5/2→^6H9/2 transition,respectively. The luminescent properties of CaO-SiO2-B2O3 glasses indicate that the glass can convert the ultraviolet in the sunlight into red light, thus increasing the intensity of red light. We can take advantage of the luminescent properties of these glasses to make kinds of light-conversion glass for agriculture.

关 键 词：发光性质 稀土激活玻璃 转光 

分 类 号：O614.33[理学—无机化学] O482.31[理学—化学]