Effect of lithium addition on Te4+ emission in TeO2-Li2O glasses

被引：11
|
作者：
Costa, Francine Bettio [1 ,2 ]
Rufino Souza, Ana Kely [2 ]
Silva, Junior Reis [2 ]
Silos Moraes, Joao Carlos [1 ]
de Oliveira Nunes, Luiz Antonio [3 ]
da Cunha Andrade, Luis Humberto [2 ]
El-Mallawany, Raouf [4 ]
Lima, Sandro Marcio [2 ]
机构：
[1] Univ Estadual Paulista UNESP, Grp Vidros & Ceram, BR-15385000 Ilha Solteira, SP, Brazil
[2] Univ Estadual Mato Grosso Sul, Grp Espectroscopia Opt & Fototerm, BR-79804970 Dourados, MS, Brazil
[3] Univ Sao Paulo, Lab Laser & Aplicacoes, BR-13560970 Sao Carlos, SP, Brazil
[4] Menoufia Univ, Fac Sci, Phys Dept, Al Minufya, Egypt
来源：
JOURNAL OF NON-CRYSTALLINE SOLIDS | 2019年 / 524卷
基金：
巴西圣保罗研究基金会;
关键词：
Te4+ centers; Tellurite glasses; Photoluminescence; Lithium as modifier; RAMAN-SPECTRA; TELLURITE GLASS; PHOTOLUMINESCENCE; CHEMISTRY; NA; CS; RB; LI;
D O I：
10.1016/j.jnoncrysol.2019.119609
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Lithium tellurite glasses with xTeO(2) + (100 - x)Li2O nominal composition, where x = 95, 90, 85, 80, 75 and 70 mol%, have been prepared to investigate the dependence of the Te4+ emission as a function of the lithium modifier. Optical and structural properties of the glasses were explored by using UV-Vis absorption, photoluminescence and photoluminescence excitation spectroscopies, photoluminescence lifetime and Raman spectroscopy. Besides, the influence of Li2O in the glass structure was verified by density, glass transition temperature, thermal stability, glass-forming tendency, optical band edge and the number of non-bridging oxygen. The results support there is a good correlation between the glass structure and the Te4+ center concentration: the Li2O content contributes to increase the Te4+ in the glass structure.
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页数：7
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