The transformation of Eu3+→Eu2+ in SiO2–Al2O3–NaF–YF3: Eu glasses and glass ceramics
Journal
Materials Letters
Journal Volume
65
Journal Issue
9
Pages
1337-1339
Date Issued
2011
Author(s)
Yang, Fugui
Chen, Guitang
You, Zhenyu
Sun, Chenli
Cao, Jiafeng
Ji, Yuexia
Wang, Yeqing
Wang, Yan
Zhu, Zhaojie
Li, Jianfu
Tu, Chaoyang
Abstract
Transparent glasses and glass ceramics of SiO2-Al 2O3-NaF-YF3: Eu3+ containing the YF3 nano-crystals were prepared in air atmosphere and their spectroscopic properties are presented. The blue emission peaked at 433 nm shown in the spectra indicate the existence of Eu2+.The transformation of Eu3+→Eu2+ is related with the existence of F -, which is the key trigger for the transformation in air atmosphere. In addition, the emission intensities of Eu3+ and Eu2+ were also related with the concentrations of Eu3+. The emission intensities increased heavily with the increasing dopant of EuF3 in both glasses and glass ceramics. When the doped concentration of EuF3 was higher than 0.5 mol.%, the concentration quenching effect occurred. © 2011 Elsevier B.V. All rights reserved.
Type
journal article