TY - JOUR ID - 70000 TI - Luminescence Properties of Oxyfluoride Glass and Glass Ceramic Doped with Y3 + Ions JO - Advanced Ceramics Progress JA - ACP LA - en SN - 2423-7477 AU - Farahinia, Laleh AU - Rezvani, Mohammad AD - Department of Materials Science and Engineering, University of Tabriz, Tabriz, Iran Y1 - 2015 PY - 2015 VL - 1 IS - 1 SP - 6 EP - 10 KW - oxyfluoride glass-ceramic KW - CaF2 nanocrystals KW - yttrium emission KW - luminescence DO - 10.30501/acp.2015.70000 N2 -  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. UR - https://www.acerp.ir/article_70000.html L1 - https://www.acerp.ir/article_70000_dbb187562ff352a3d2b65c1d398dd047.pdf ER -