无容器制备Er^(3+)/Yb^(3+)共掺La_2O_3-TiO_2-ZrO_2玻璃及其上转换发光研究  

Upconversion Luminescence of Er^(3+)/Yb(3+) Co-doped La_2O_3-TiO_2-ZrO_2 Glasses Prepared by Containerless Processing

作　　者：朱美娟[1] 余建定[2] 张明辉[2] 谷彦静 李勤[2] 方必军[1] 赵洪阳[2] 沈清 

机构地区：[1]常州大学材料科学与工程学院,常州213164 [2]中国科学院上海硅酸盐研究所,上海200050 [3]常州宇环光电有限公司,常州213164

出　　处：《无机材料学报》2015年第4期391-396,共6页Journal of Inorganic Materials

基　　金：常州市国际科技合作项目(CZ20123004);上海硅酸盐研究所科技创新项目(Y32ZC1110G;Y22ZB1110G)~~

摘　　要：利用无容器技术制备了(La0.94-xEr0.06Ybx)(Ti0.95Zr0.05)2.25O6(x=0~0.24,间隔0.04)球状透明玻璃,其稀土离子掺杂浓度最大值达到30%。通过DTA分析发现,玻璃具有很好的热稳定性,x=0时玻璃化转变温度Tg和析晶起始温度To分别为818℃和906℃,ΔT(ΔT=To–Tg)为88℃,玻璃形成能力较低。随着Yb3+浓度提高,Tg、To和ΔT逐渐下降,说明Yb3+降低了玻璃的热稳定性和形成能力。利用紫外可见分光光度计测定了样品的吸收/透过光谱,玻璃在975 nm具有很强的吸收峰,表明Yb3+可以有效提高玻璃对入射光的吸收强度;在可见光范围内除特征吸收外具有近70%的透过率,说明玻璃具有良好的透可见光性能,有望获得高强上转换发光输出。上转换荧光光谱研究表明:在980 nm激光泵浦下,获得了中心位于535、554和672 nm处的绿、红发光带,x=0.16的发光最强,672 nm处的红光强度是x=0的近130倍。上转换发光强度与泵浦功率关系的分析表明:535、554 nm处的绿光和672 nm处的红光发光均是双光子发光过程。Sphere transparent titanate glasses（La0.94-xEr0.06Ybx）（Ti0.95Zr0.05）2.25O6（x=0–0.24, in steps of 0.04） were prepared by containerless processing. The DTA curve shows that the glass（x=0） has high glass transition temperature（Tg=818℃） and onset temperature of crystallization（To=906℃）. The thermal stability and the glass forming ability decrease with the Yb3＋ concentration increasing. Strong absorption bands at 975 nm are observed, showing effective absorption of Yb3＋ at 975 nm. The transmittance is almost 70% in 300-3000 nm except characteristic absorption of Er3＋ and Yb3＋. Three emission bands centered at 535, 554, 672 nm are obtained at the excitation of 980 nm laser. When the Yb3＋ concentration x is 0.16, the glass sample performs the strongest upconversion luminescence, which emission intensity at 672 nm is almost 130 times as high as that of Er3＋-doped glass at room temperature.

关 键 词：上转换发光 无容器技术 钛酸盐玻璃 Er3+/Yb3+共掺杂 

分 类 号：TQ174[化学工程—陶瓷工业]