含纳米晶颗粒的Yb^(3+)/Er^(3+)共掺透明碲酸盐玻璃陶瓷的光谱性质研究  

Spectroscopic Properties of Er^(3+),Yb^(3+)-Codoped Tellurite Glass-Ceramics Containing Nanocrystals

作　　者：周刚[1] 戴世勋[2] 于春雷[1] 张军杰[1] 胡丽丽[1] 姜中宏[1] 

机构地区：[1]中国科学院上海光学精密机械研究所 [2]宁波大学信息科学与工程学院,浙江宁波315211

出　　处：《中国稀土学报》2005年第5期518-523,共6页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金(60207006);上海市青年启明星项目(04QMX1448)资助课题

摘　　要：在组成为15Li2O-15Nb2O5-70TeO2-0.1Er2O3-0.4Yb2O3(%,摩尔分数)的碲酸盐玻璃基础上,采用两步热处理法制备了透明的含纳米晶颗粒碲酸盐玻璃陶瓷。通过X射线衍射(XRD)测试表明,玻璃陶瓷中的晶体颗粒组成为Yb6Te5O19.2或Er6Te5O19.2,晶粒尺寸约为55 nm。根据Judd-Ofelt理论计算了Er3+离子在基质玻璃和玻璃陶瓷中的光谱参数Ωt(t=2,4,6)以及Er3+∶4I15/2→4I13/2跃迁自发辐射几率,根据Mc-Cumber理论计算了Er3+∶4I13/2→4I15/2跃迁的发射截面。测试了基质玻璃和玻璃陶瓷的拉曼光谱,对比研究了铒离子在基质玻璃和玻璃陶瓷中1.5μm处荧光和上转换光谱特性。A transparent tellurite glass-ceramic containing nanocrystals based on the composition of 15Li2O-15Nb2O5-7OTeO2-0. 1Er2O3-0.4Yb2O3 （mol%） was prepared by using a two-step heat-treatment. The XRD patterns show that the composition of crystals in glass-ceramics is possibly Yb6Te5O19.2 or Er6Te5O19.2, and the dimension of crystals is about 55 nm. The Judd-Ofelt parameters, Ω1,（t = 2, 4, 6）, and the sport-taneous emission probability of Er^3 ＋ in glass and glassceramics were calculated from optical absorption spectra. The absorption cross section of Er^3 ＋ ：^4I15/2→^4I13/2 and the emission cross section of Er^3＋ ：^4I13/2→^4I15/2 in two samples were also calculated. Raman scattering spectra of glass and glass-ceramic were measured, the fluorescence spectra and the upconversion spectra of Er^3 ＋ ion in glass and glass-ceramic were compared.

关 键 词：纳米晶 碲酸盐玻璃 玻璃陶瓷 铒离子 光谱性质 稀土 

分 类 号：TQ171[化学工程—玻璃工业]