Add time:08/12/2019         Source:sciencedirect.com

Oxyfluoride lead-based and lead-free germanate glasses were heat-treated in order to fabricate transparent glass-ceramics. Cubic β-PbF2 nanocrystals are well formed during crystallization of lead germanate glass. The up-conversion luminescence spectra of Er3+ ions in lead germanate glass-ceramic system are enhanced significantly due to partial incorporation of the optically active ions into fluoride crystalline phase. These effects are not significant in oxyfluoride lead-free germanate glass after heat treatment process. The crystallization of barium gallo-germanate glass with BaF2 is more complex and the presence of four crystalline phases BaF2, BaO, Ba3Ga2Ge4O14 and GeO2 was verified by X-ray diffraction measurements.

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