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Received July 16, 2004
Accepted October 27, 2004
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융제 및 고분자 첨가 용액으로부터 분무 열분해 공정에 의해 합성한 Y2O3:Eu 형광체
Y2O3:Eu Phosphor Particles Prepared by Spray Pyrolysis from Solution Containing Flux and Polymeric Precursor
한국화학연구원 화학소재부, 305-600 대전시 유성구 장동 100 1화학과 연세대학교, 120-749 서울시 서대문구 신촌동 134 2건국대학교 화학공학과, 43-701 서울시 광진구 화양동 1
Advanced Materials Division, Korea Research Institute of Chemical Technology, 100, Jang-dong, Yuseong-gu, Daejeon 305-600, Korea 1Department of Chemistry, Yonsei University, 134, Sinchon-dong, Seodaemun-gu, Seoul 120-749, Korea 2Department of Chemical Engineering, Konkuk University, 1, Hwayang-dong, Gwangjin-gu, Seoul 143-701, Korea
Korean Chemical Engineering Research, February 2005, 43(1), 80-84(5), NONE Epub 4 March 2005
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Abstract
초음파 분무 열분해 공정에 의해 나노 크기의 Y2O3:Eu 형광체 분말들을 합성하였다. 고분자 전구체와 융제로 사용 되어진 리튬 탄산염이 나노 크기의 Y2O3:Eu 형광체의 형태 및 발광 특성에 미치는 영향에 대해 조사하였다. 고분자 전구체와 융체를 동시에 사용했을 때 분무 열분해 공정에 의해 제조된 구형의 마이크론 크기의 분말들은 고온의 후열 처리 과정에서 나노 크기의 분말로 전환되었다. Y2O3:Eu 형광체의 평균 크기는 분무용액에 첨가되어지는 고분자 전구체와 융제인 리튬 탄산염의 첨가량 및 분무 열분해 공정의 반응기 온도에 많은 영향을 받았다. 고농도의 고분자 전구체를 함유한 분무용액으로부터 고온의 반응기에서 합성되고 1,000 ℃ 이상에서 후열처리한 나노크기 Y2O3:Eu 분말들은 진공자외선 하에서 좋은 발광 특성을 나타내었으며, 고상 공정에 의해 합성된 상용의 Y2O3:Eu 형광체와 비슷한 발광 세기를 가졌다.
Nano-sized Y2O3:Eu phosphor particles were prepared by ultrasonic spray pyrolysis. The effect of polymeric precursor and lithium carbonate flux on the morphology and luminescence characteristics of nano-sized Y2O3:Eu phosphor particles was investigated. When using the spray solution containing both the polymeric precursor and the flux, the Y2O3:Eu particles with spherical shape and micron size were turned into nano-sized Y2O3:Eu phosphor particles during the post-treatment at high temperature. The mean size of Y2O3:Eu phosphor particles was affected by the contents of polymeric precursors and lithium carbonate flux, and preparation temperature. The as-prepared particles by spray pyrolysis at high temperature from solution containing high contents of polymeric precursors had good photoluminescence intensity under vacuum ultraviolet after post-treatment above 1,000 ℃. The prepared nano-sized Y2O3:Eu phosphor particles had comparable photoluminescence intensity under vacuum ultraviolet light with that of the commercial Y2O3:Eu phosphor particles prepared by solid state reaction method.
Keywords
References
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Park JC, Moon HK, Kim DK, Byeon SH, Kim BC, Suh KS, Appl. Phys. Lett., 77, 2162 (2000)
Rao RP, J. Electrochem. Soc., 143(1), 189 (1996)
Pan Y, Su Q, Xu H, Chen T, Ge W, Yang C, Wu M, J. Solid State Chem., 174(1), 69 (2003)
Oing S, Barthou C, Denis JP, Pelle F, Blanzat B, J. Lumines., 28(1), 1 (1983)
Villalobos G, Leclerq O, Paris H, Summers CJ, "Controlling the Size and Shape of Co-Precipitated Y2O3:Eu Phosphors", Ext. Abs. 3rd Int 1 Conf. Sci. & Tech. Display Phosphors, pp. 253, Huntington Beach, CA (1997)
Bihari B, Eilers H, Tissue BM, J. Lumines., 75(1), 1 (1997)
Xu C, Wakins BA, Sievers RE, Jing X, Trowga P, Gibbons CS, Vecht A, Appl. Phys. Lett., 71, 1643 (1997)
Roh HS, Kim EJ, Kang HS, Kang YC, Park HD, Park SB, Jpn. J. Appl. Phys., 42(5A), 2741 (2003)
Kang YC, Roh HS, Park SB, Adv. Mater., 12(6), 451 (2000)
Kim EJ, Kang YC, Park HD, Ryu SK, Mater. Res. Bull., 38, 515 (2003)
Kang YC, Roh HS, Park SB, J. European Ceram. Soc., 22, 1661 (2002)
