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Received May 2, 2005
Accepted December 5, 2005
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Effect of preparation temperature on the formation of Sr2CeO4 phosphor particles in the spray pyrolysis
Department of Chemical Engineering, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701, Korea
Korean Journal of Chemical Engineering, May 2006, 23(3), 496-498(3), 10.1007/BF02706755
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Abstract
Sr2CeO4 phosphor particles were prepared by spray pyrolysis at various preparation temperatures. The effect of preparation temperatures on the morphology, crystal structure and photoluminescence characteristics of the post-treated Sr2CeO4 phosphor particles was studied. Phase pure Sr2CeO4 phosphor particles were not produced by spray pyrolysis without post-treatment. The optimum post-treatment temperature to produce the Sr2CeO4 phosphor particles with high photoluminescence intensity was 1,000 °C in spray pyrolysis. The spherical morphology of the as-prepared particles obtained at high preparation temperatures above 1,400 °C had maintained after post-treatment at 1,000 °C. The relative photoluminescence intensities of the Sr2CeO4 phosphor particles varied with the preparation temperatures in the spray pyrolysis. The as-prepared particles obtained by spray pyrolysis at preparation temperatures below 1,400 °C converted into phase pure Sr2CeO4 phosphor particles after post-treatment at 1,000 °C. The optimum preparation temperature of the as-prepared particles was 1,400 °C to produce the Sr2CeO4 phosphor particles with spherical shape and high photoluminescence intensity in the spray pyrolysis.
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References
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