Effects of rehydration on Tb3+ spectroscopy in sol–gel glasses

Autor:	A.J. Silversmith, D.M. Boye, Thao Nguyen Nguyen, K.R. Hoffman
Rok vydání:	2007
Předmět:	Chemistry Annealing (metallurgy) Diffusion Analytical chemistry Mineralogy Condensed Matter Physics Fluorescence Electronic Optical and Magnetic Materials Thermogravimetry Materials Chemistry Ceramics and Composites Spectroscopy Luminescence Sol-gel Visible spectrum
Zdroj:	Journal of Non-Crystalline Solids. 353:2350-2354
ISSN:	0022-3093
DOI:	10.1016/j.jnoncrysol.2007.03.021
Popis:	Spectroscopy of sol–gel silicate glasses containing Tb3+ is used to investigate the diffusion of water from the atmosphere into annealed glass samples. In materials that are annealed to 900 °C the blue–violet 5D3 → 7FJ fluorescence is comparable in intensity to green emission from the 5D4 level. However, the 5D3 emission is reduced to ∼5% of its original strength in several hours if glasses are exposed to ambient conditions. Re-annealing restores the original intensity of the 5D3 fluorescence. The degree of fluorescence quenching is shown to depend strongly on initial preparation of the sol–gel materials and on annealing conditions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a2e8e090c02e5c3176d286a51331e9ba https://doi.org/10.1016/j.jnoncrysol.2007.03.021 Zobrazit plný text záznamu Full Text from ScienceDirect