Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Optimization of VUV Characteristics of M3MgSi2O8:Eu2+ (M=Ca, Sr, Ba) Phosphor by Spray Pyrolysis

분무열분해법을 이용하여 M3MgSi2O8:Eu2+ (M=Ca, Sr, Ba) 형광체 분말의 VUV 특성 최적화

  • Jung, You-Ri (Department of Chemical Engineering, Kongju National University) ;
  • Jung, Kyeong-Youl (Department of Chemical Engineering, Kongju National University)
  • 정유리 (공주대학교 화학공학부) ;
  • 정경열 (공주대학교 화학공학부)
  • Published : 2008.10.28
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Abstract

Spray pyrolysis was applied to prepare $M_{3}MgSi_{2}O_{8}:Eu^{2+}$ (M=Ca, Sr, Ba) blue phosphor powder. The library of a Ca-Sr-Ba ternary system was obtained by a combinatorial method combined with the spray pyrolysis in order to optimize the luminescent property under vacuum ultraviolet (VUV) excitation. 10 potential compositions were chosen from the first screening. The emission shifted to longer wavelength as Ca became a dominant element and the emission intensity was greatly reduced in the composition region at which Ba is dominant element. On the base of the first screening result, the second fine tuning was carried out in order to optimize the luminescence intensity under VUV excitation. The optimal composition for the highest luminescence intensity was $(Ca_{1.7},\;Sr_{0.3},\;Ba_{1.0})Si_{2}O_{8}:Eu^{2+}$ which had the color coordinate of (0.152, 0.072) and about 64% emission intensity of $BaMgAl_{10}O_{17}$ (BAM) phosphor.

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