SrO/Al_2O_3对微晶玻璃析晶与发光性能的影响  

Influence of SrO to Al_2O_3 Ratio on Crystallization and Luminescent Properties of Glass-ceramics

作　　者：李宏[1] 王倩[1] 章钊[1] 武艳萍[1] 

机构地区：[1]武汉理工大学硅酸盐材料工程教育部重点实验室,武汉430070

出　　处：《武汉理工大学学报》2009年第22期12-15,共4页Journal of Wuhan University of Technology

摘　　要：通过调整SrO和Al2O3的相对含量,在不同的热处理制度下制备Sm3+掺杂SrO-Al2O3-SiO2系统微晶玻璃,利用XRD、SEM、荧光光谱等测试手段对该系统微晶玻璃的析晶行为和发光性能进行研究。结果表明:得到的SrO-Al2O3-SiO2微晶玻璃的主晶相为单斜锶长石(SrAl2Si2O8),SrO/Al2O3(%)大于10∶7或小于10∶13都会使析晶含量减少,发光强度减弱;当SrO/Al2O3为10∶7时,可以形成析晶情况及发光性能良好的微晶玻璃。Sm3+掺杂的SrO-Al2O3-SiO2微晶玻璃在405 nm紫光或475 nm蓝光的激发下发射绿光和橙红光,可以通过改变基质玻璃的组成来调节各发射峰的强度比例,结合紫光或蓝光LED,有望应用于白光LED器件。The SrO-Al2O3-SiO2 glass-ceramics doped rare earth was prepared by different treatment schedules. The influence of SrO to Al2O3 ratio on crystallization behavior and luminescent properties of the glass - ceramics were investigated by XRD,SEM and fluorescence spectra. The results indicate that the main crystal phase in this system was monocelsian （SrAl2Si2O8）. When the ratio of SrO to Al2O3 is greater than 10：7 or less than 10：13, the tendency of crystallization and the luminescent intensity will be decreased. When the ratio of SrO to Al2O3 is 10 ： 7, suitable crystallization and luminescent property can be obtained. The Sm3＋ doped SrO-Al2O3-SiO2 glass-ceramics can emit green and red light under the excitation of 405 nm purple or 475 blue lights. The relative emission intensity ratios of these emission peaks can be adjusted by changing the composition of glass. This indicates that the Sm3 ＋ doped SrO-Al2O3-SiO2 glass-ceramics are potential fluorescent materials for white light-emitting diode devices.

关 键 词：SrO/Al2O3 微晶玻璃 析晶 发光性能 白光发光二极管 

分 类 号：TQ171.733[化学工程—玻璃工业]