Abstract—
We have prepared glasses in the ZrF4–BaF2–LaF3–AlF3–NaF (ZBLAN) and HfF4–BaF2–LaF3–AlF3–NaF (HBLAN) systems in which fluorine anions are partially replaced by chlorine and bromine anions. Structural changes in the chlorine-substituted glasses have been investigated by Raman spectroscopy and their crystallization behavior has been studied by differential thermal analysis and X-ray diffraction. The results demonstrate a characteristic decrease in glass transition temperature (Tg) and the precipitation of fine-particle crystalline chloride and bromide phases in a temperature range well below the crystallization temperature (Tx) of the fluoride analogues. We have identified phases that crystallize during heat treatment of the glasses at various temperatures.
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ACKNOWLEDGMENTS
This work was supported by the Russian Science Foundation, project nos. 18-03-00149 and 17-02-00518 in the part of Raman spectroscopy studies.
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Brekhovskikh, M.N., Moiseeva, L.V., Shukshin, V.E. et al. Crystallization Behavior of Glasses in the ZrF4–BaF2–LaF3–AlF3–NaF and HfF4–BaF2–LaF3–AlF3–NaF Systems Modified with Chlorine and Bromine Ions. Inorg Mater 55, 173–179 (2019). https://doi.org/10.1134/S0020168519020018
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DOI: https://doi.org/10.1134/S0020168519020018