Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Optical and Long After-Glow Characteristics of $Eu^{2+}$, $Nd^{3+}$ doped $BaAl_{2}O_{4}$ Phosphorescent Crystals

($Eu^{2+}$, $Nd^{3+}$를 도핑시킨 $BaAl_{2}O_{4}$ 형광체의 광학 및 장잔광특성

  • Kim, Jeong-Hwan (Dept. of Industrial Chemical Engineering Chungbuk National University) ;
  • Kim, Byung-Gyu (Korea Institute of Geoscience and Mineral Resources) ;
  • Lee, Dong-Kyu (Dept. of Industrial Chemical Engineering Chungbuk National University)
  • Published : 2002.09.30
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Abstract

In recent days, the study of a new phosphorescent phosphor has been performed in order to overcome the defect of sulfide phosphor and increase the brightness and long after-glow characteristic of phosphorescent phosphor. Particularly, sulfide phosphor usually used is so chemically unstable that the study of oxide phosphors are processing. $Eu^{2+}$, $Nd^{3+}$ doped Ba-Al-O phosphors sintered at $600{\sim}1500^{\circ}C$ for 2hours had the PL emission spectrum and after-glow over $1200^{\circ}C$. In this system, as the mole concentration of alumina increases, emission bands of phosphors moved from 500nm to 380nm. The optimum concentration of flux was 5wt% and after-glow characteristics of phosphors were found at the host material molar ratio ($BaCO_{3}:Al_{2}O_{3}$), 1:1 and 1:3.

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