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

SrAl2O4: Eu2+, Dy3+ 축광안료의 고온안정성에 관한 연구

  • 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)
  • 김진호 (한국세라믹기술원 이천분원) ;
  • 이승용 (한국세라믹기술원 이천분원) ;
  • 김태호 (한국세라믹기술원 이천분원) ;
  • 한규성 (한국세라믹기술원 이천분원) ;
  • 황광택 (한국세라믹기술원 이천분원) ;
  • 조우석 (한국세라믹기술원 이천분원)
  • Received : 2014.08.28
  • Accepted : 2014.11.04
  • Published : 2014.11.30

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

References

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  1. 스컬용융법에 의한 SrAl2O4 : Eu+2,Dy+3 축광성 형광체 합성 vol.27, pp.1, 2014, https://doi.org/10.6111/jkcgct.2017.27.1.042