Eu2+ and Gd3+ Distributions in Fluorohafnate Glasses Studied by Electron Paramagnetic Resonance
Source abstract
Abstract
We have studied electron paramagnetic resonance spectra of europium- and gadolinium-activated ZBLAN-type fluorohafnate glasses, using the composition 58HfF4 · 20BaF2 · 2LaF3 · 3AlF3 · 17NaF as an example. The ratio of the concentration of free Eu2+ and Gd3+ ions to that of ions in clusters has been quantitatively evaluated for the first time. The percentage of free ions has been shown to increase significantly with decreasing activator concentration. At activator concentrations of 1.25 mol % EuF2 and 1 mol % GdF3, the activator ions predominantly form clusters and only a small fraction of Eu2+ and Gd3+ are present as individual ions, whereas at 0.1 mol % EuF2 the concentration of free ions is comparable to that of ions in the clusters.
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Research context
OpenAlex topics: Glass properties and applications · Luminescence Properties of Advanced Materials · Mineralogy and Gemology Studies
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References (11)
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