Structure and crystallization of fluorozirconate glasses. Study by the fluorescence of Pr3+ ions

The 1D2->3H4 fluorescence in fluorozirconate glasses has been studied in non-heated and heated samples. From spectra and decays, several informations were obtained. Two types of crystals grow in this glass. By thermal treatment at Tg a demixtion of the constituants appears. It was impossible to obtain transparent vitroceramics.