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http://dx.doi.org/10.6111/JKCGCT.2021.31.2.084

Photoluminescence properties of oxy-fluoride glass-ceramics of La2O3-CaF2-Al2O3-SiO2 system  

Ha, Taewan (Department of Advanced Materials Science and Engineering, Kyonggi University)
Kang, Seunggu (Department of Advanced Materials Science and Engineering, Kyonggi University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.31, no.2, 2021 , pp. 84-88 More about this Journal
Abstract
The change of the photoluminescence properties of La2O3-CaF2-Al2O3-SiO2 glass-ceramics doped with rare earth material, that is used as laser and optical sensors, was analyzed according to heat treatment temperature. The heat treatment conditions for fabricating glass-ceramics were obtained through non-isothermal thermal analysis, and X-ray diffraction analysis was performed to determine the degree of crystal growth and kinds of crystal phases generated according to the heat treatment temperature. Using Scherrer's equation, it was predicted that crystals with a size of 25~40 nm would be generated inside the glass-ceramics. Photoluminescence (PL) analysis showed that the specimens heat-treated at 660℃ to 670℃ for 1 hour had the highest PL intensity. Also, from the CIE color coordinate analysis, all glass-ceramics specimens emitted red-orange light regardless of the heat treatment condition.
Keywords
Oxy-fluoride; Glass-ceramics; Rare earth material; Heat-treatment; Photoluminescence;
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