The transformation of Eu3+a'Eu2+ in SiO2-Al2O3-NaF-Y F3: Eu glasses and glass ceramics

Transparent glasses and glass ceramics of SiO2-Al2O3-NaF-Y F3: Eu3+ containing the YF3 nano-crystals were prepared in air atmosphere and their spectroscopic properties are presented. The blue emission peaked at 433nm shown in the spectra indicate the existence of Eu2+.The transformation of Eu3+a...

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Bibliographic Details
Published in:Materials letters 2011-05, Vol.65 (9), p.1337-1339
Main Authors: Yang, Fugui, Chen, Guitang, You, Zhenyu, Sun, Chenli, Cao, Jiafeng, Ji, Yuexia, Wang, Yeqing, Wang, Yan, Zhu, Zhaojie, Li, Jianfu, Tu, Chaoyang
Format: Article
Language:English
Subjects:
Atmospheres
Emission spectroscopy
Glass
Glass ceramics
Nanocrystals
Quenching
Silicon dioxide
Spectral emissivity
Transformations
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Summary:Transparent glasses and glass ceramics of SiO2-Al2O3-NaF-Y F3: Eu3+ containing the YF3 nano-crystals were prepared in air atmosphere and their spectroscopic properties are presented. The blue emission peaked at 433nm shown in the spectra indicate the existence of Eu2+.The transformation of Eu3+a'Eu2+ is related with the existence of Fa degree , 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 0.5mol.%, the concentration quenching effect occurred.
ISSN:0167-577X
DOI:10.1016/j.matlet.2011.01.076