制备和发光
(中南大学 材料科学与工程学院，长沙，410083)
摘 要: 采用传统熔体冷却技术制得了新型SrO-ZnO-B2O3-SiO2-M2O3(M=Y, La, Gd)发光玻璃。对玻璃密度、紫外−可见光区的透过性能以及荧光发射进行了检测。结果表明：SrO-ZnO-B2O3-SiO2(SZBS)玻璃在可见光区具有高透过性能，稀土氧化物的引入增强了玻璃在可见光区的透过率。SZBS玻璃的激发主峰位于221 nm附近，发射光谱则是峰值位于410、475和502 nm附近的宽带，且蓝绿光强于紫外光发射，紫外光和蓝绿光发射分别归属于ZnO激子复合发光、Zn间隙原子的复合发光以及电子和深俘获的空穴复合发光。在SZBS玻璃组成中引入稀土氧化物造成激发峰红移并能增强玻璃的蓝绿光发射。
关键字: 闪烁玻璃；SrO-ZnO-B2O3-SiO2；稀土氧化物；光致发光
SrO-ZnO-B2O3-SiO2-M2O3(M=Y, La, Gd) glasses
（School of Materials Science and Engineering, Central South University, Changsha 410083, China）
Abstract:SrO-ZnO-B2O3-SiO2-M2O3(M=Y, La, Gd) luminescence glasses were prepared by conventional melt quenching technology. Density, UV-VIS transmission spectra and fluorescence spectrum of the glasses were investigated. SrO-ZnO-B2O3-SiO2(SZBS) glass has high transmission capability in visible light region. The excitation peak of SZBS glass locates around 221 nm. The photoluminescence spectrum of SZBS glass is a broad band with peaks around 410, 475 and 502 nm, which are attributed to the exciton emission of ZnO, interspaceal Zn atoms recombination luminescence, electron and deep captured hole recombination process, respectively. Besides the excitation peak appears red-shift, the transmission ratio of glasses improves and the blue-green photoluminescence enhances with rare earth oxides(Y2O3, La2O3, Gd2O3) introduced into SZBS glass.
Key words: scintillating glass; SrO-ZnO-B2O3-SiO2; rare earth oxide; photoluminescence
