Study of fluorine losses in oxyfluoride glasses

Stable Wollastonite-Cuspidine Glass-Ceramic Using Inexpensive Raw Materials

“…It reduces the glass transition and the reflective index of the glasses. In glasses, fluorine has important effect in phase separation and the subsequent bulk crystallization [14]. Also in this consequence, fluorine aids the crystallization by lowering viscocity which results in faster atom mobility and rearrangement [15][16][17].…”

Upconversion luminescence in Er3+-doped germanate-oxyfluoride and tellurium-germanate-oxyfluoride transparent glass-ceramics

“…The batch powders of 30 g were thoroughly mixed in an agate mortar, and melted in fused silica crucibles at a temperature of 9801C for GPOF glass and 9301C for TGPOF glass. The melts were held for a short time of 8 min to restrict fluoride losses [20] and then cast onto a copper plate and pressed by another copper plate from the top, forming a glass plate of about 2 mm thickness. The glasses were subsequently annealed near the glass transition temperatures for 15 min and then allowed to cool to room temperature in the furnace.…”

Luminescence spectroscopy of rare earth-doped oxychloride lead borate glasses

“…However, the final glass compositions are somewhat different from the nominal starting ones because of the amount of gases lost during the melting processes due to the following reaction: PbCl 2 +H 2 OPbO+ 2HClm. Analytical studies of the other mixed oxyhalide glass systems revealed that the fluorine [33] or chlorine [34] losses could be quite large. Recently, the fluorine retention in oxyfluoride silicate glasses was examined as a function of glass composition [35].…”