Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Characteristics of BaMgAl10O17:Eu Phosphor Powders Prepared from Spray Solution with Organic Additives and NH4Cl Flux

유기 첨가제 및 NH4Cl 융제를 함유하는 분무용액으로부터 합성된 BaMgAl10O17:Eu 형광체의 특성

  • Lee, Sang Ho (Department of Chemical Engineering, Konkuk University) ;
  • Koo, Hye Young (Department of Chemical Engineering, Konkuk University) ;
  • Ko, Da Rae (Department of Chemical Engineering, Konkuk University) ;
  • Lee, Su Min (Department of Chemical Engineering, Konkuk University) ;
  • Kang, Yun Chan (Department of Chemical Engineering, Konkuk University)
  • 이상호 (건국대학교 화학공학과) ;
  • 구혜영 (건국대학교 화학공학과) ;
  • 고다래 (건국대학교 화학공학과) ;
  • 이수민 (건국대학교 화학공학과) ;
  • 강윤찬 (건국대학교 화학공학과)
  • Received : 2009.10.16
  • Accepted : 2009.11.04
  • Published : 2010.02.28
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Abstract

The precursor powders with thin wall structure were prepared by spray pyrolysis from the spray solution with ethylenediaminetetraacetic acid, citric acid and $NH_4Cl$ flux. The $BaMgAl_{10}O_{17}:Eu$ phosphor powders formed from the spray solution without organic additives and flux material had sizes of $1{\sim}5{\mu}m$ and hollow structure with high thickness at post-treatment temperature of $1,200^{\circ}C$. However, $BaMgAl_{10}O_{17}:Eu$ phosphor powders formed from the spray solution with ethylenediaminetetraacetic acid, citric acid and $NH_4Cl$ flux had fine size and plate-like shape. The mean crystallite sizes of the phosphor powders with fine sizes were 23, 35, and 33 nm when the content of $NH_4Cl$ flux were 0, 6, 35 wt% of phosphor. The photoluminescence intensity of the phosphor powders formed from the spray solution with the optimum amount of $NH_4Cl$ flux as 35 wt% was 215% of that of the phosphor powders formed from the spray solution without flux material.

에틸렌디아민테트라아세트산, 구연산 및 $NH_4Cl$ 융제가 첨가된 분무용액으로부터 분무열분해법에 의해 얇은 막 구조의 전구체 분말들을 합성하였다. $1,200^{\circ}C$에서 소성 과정을 거친 유기 첨가제와 융제를 사용하지 않은 $BaMgAl_{10}O_{17}:Eu$ 형광체는 $1{\sim}5{\mu}m$ 크기의 구형이며, 두꺼운 막 형태의 속이 빈 구조를 가졌다. 반면에 에틸렌디아민아세트산과 구연산을 첨가하여 합성된 BAM:Eu 형광체는 판상 구조의 미세한 크기를 가졌다.$NH_4Cl$ 융제의 첨가량이 0, 6, 35 wt%일때 합성된 미세 형광체들의 결정자 크기는 각각 23, 35, 33 nm였다. 최대의 발광 세기를 나타내는 최적의 융제 첨가량은 형광체의 35 wt%였으며, 융제를 첨가하지 않은 분무용액으로부터 합성된 형광체의 발광 세기의 215%였다.

Keywords

References

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