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Korean Chemical Engineering Research,
Vol.48, No.1, 75-79, 2010
Vol.48, No.1, 75-79, 2010
유기 첨가제 및 NH4Cl 융제를 함유하는 분무용액으로부터 합성된 BaMgAl10O17:Eu 형광체의 특성
Characteristics of BaMgAl10O17:Eu Phosphor Powders Prepared from Spray Solution with Organic Additives and NH4Cl Flux
에틸렌디아민테트라아세트산, 구연산 및 NH4Cl 융제가 첨가된 분무용액으로부터 분무열분해법에 의해 얇은 막 구조의 전구체 분말들을 합성하였다. 1,200 ℃에서 소성 과정을 거친 유기 첨가제와 융제를 사용하지 않은 BaMgAl10O17:Eu 형광체는 1~5 μm 크기의 구형이며, 두꺼운 막 형태의 속이 빈 구조를 가졌다. 반면에 에틸렌디아민아세트산과 구연산을 첨가하여 합성된 BAM:Eu 형광체는 판상 구조의 미세한 크기를 가졌다. NH4Cl 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.
The precursor powders with thin wall structure were prepared by spray pyrolysis from the spray solution with ethylenediaminetetraacetic acid, citric acid and NH4Cl flux. The BaMgAl10O17:Eu phosphor powders formed from the spray solution without organic additives and flux material had sizes of 1~5 μm and hollow structure with high thickness at post-treatment temperature of 1,200 ℃. However, BaMgAl10O17:Eu phosphor powders formed from the spray solution with ethylenediaminetetraacetic acid, citric acid and NH4Cl 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 NH4Cl 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 NH4Cl flux as 35 wt% was 215% of that of the phosphor powders formed from the spray solution without flux material.
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참고문헌정보(참고문헌, 인용문헌)는 화학공학소재연구정보센터에 의해 제공되고 있습니다.