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http://dx.doi.org/10.4191/kcers.2014.51.6.618

Thermal Stability of SrAl2O4: Eu2+, Dy3+ with Long Afterglow Phosphorescence  

Kim, Jin-Ho (Icheon Branch, Korea Institute of Ceramic Engineering and Technology)
Lee, Seung-Yong (Icheon Branch, Korea Institute of Ceramic Engineering and Technology)
Kim, Tae-Ho (Icheon Branch, Korea Institute of Ceramic Engineering and Technology)
Han, Kyu-Sung (Icheon Branch, Korea Institute of Ceramic Engineering and Technology)
Hwang, Kwang-Taek (Icheon Branch, Korea Institute of Ceramic Engineering and Technology)
Cho, Woo-Seok (Icheon Branch, Korea Institute of Ceramic Engineering and Technology)
Publication Information
Journal of the Korean Ceramic Society / v.51, no.6, 2014 , pp. 618-622 More about this Journal
Abstract
Oxide phosphorescent phosphor has an wide application in ceramic art and decoration due to its chemical and mechanical properties. Here, phosphorescent properties of strontium aluminate phosphor ($SrAl_2O_4:Eu^{2+}$, $Dy^{3+}$) emitting yellowish-green light was investigated with thermal treatment at $1250^{\circ}C$ under air and reducing atmosphere. The characterizations of thermally treated samples were analyzed using X-ray fluorescence (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), fluorescence spectrometer. $SrAl_2O_4:Eu^{2+}$, $Dy^{3+}$ still showed a good phosphorescent properties after annealing process in reducing atmosphere, while phosphorescence of $SrAl_2O_4:Eu^{2+}$, $Dy^{3+}$ annealed in air seriously degraded, due to oxidation of $Eu^{2+}$ to $Eu^{3+}$ ions. It was also observed that $SrAl_2O_4:Eu^{2+}$, $Dy^{3+}$ annealed in reducing atmosphere emitted yellowish-green light during 3 h after being exposed to sunlight.
Keywords
Phosphorescent phosphor; $SrAl_2O_4:Eu^{2+}$; $Dy^{3+}$; Reducing atmosphere; Heat treatment; Afterglow;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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