%0 Journal Article %T Luminescence Properties of Oxyfluoride Glass and Glass Ceramic Doped with Y3 + Ions %J Advanced Ceramics Progress %I Materials and Energy Research Center (MERC) Iranian Ceramic Society (ICERS) %Z 2423-7477 %A Farahinia, Laleh %A Rezvani, Mohammad %D 2015 %\ 03/01/2015 %V 1 %N 1 %P 6-10 %! Luminescence Properties of Oxyfluoride Glass and Glass Ceramic Doped with Y3 + Ions %K oxyfluoride glass-ceramic %K CaF2 nanocrystals %K yttrium emission %K luminescence %R 10.30501/acp.2015.70000 %X  Oxyfluoride glass ceramics containing CaF2 nano-crystals doped with Y3+ ions were prepared by one-step crystallization of SiO2- Al2O3- CaO- CaF2 glasses at different temperatures. X- ray diffraction (XRD) results have revealed that CaF2 was the only precipitated crystalline phase in glass ceramic samples. According to the XRD results, a glass ceramic was selected as the best sample in order to compare its optical properties with basic glass. Photoluminescence (PL) and UV-Vis spectra have been employed to study optical properties of glass and glass ceramic samples. A broad band emission in the visible region was observed, which was stronger in the glassy sample. Scanning electron microscopy (SEM) observation and EDX (Energy-dispersive X-ray spectroscopy) results proved the entrance of Y3+ ions into only some of the crystals embedded in the glassy matrix, which was the rational reason of photoluminescence intensity decrease in glass-ceramic. %U https://www.acerp.ir/article_70000_dbb187562ff352a3d2b65c1d398dd047.pdf