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Received August 12, 2005
Accepted April 7, 2006
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Comparison of YAG: Eu phosphor synthesized by supercritical water and solid-state methods in a batch reactor
Department of Chemical Engineering, Yonsei University, Seoul 120-749, Korea
Korean Journal of Chemical Engineering, September 2006, 23(5), 842-846(5), 10.1007/BF02705938
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Abstract
Phosphor yttrium aluminum garnet (Y3Al5O12, YAG) doped with Eu (10 at%) was synthesized by supercritical water (SCW) and solid-state methods in a batch reactor. The crystals, morphologies and luminescent properties of the phosphors obtained from different pH conditions in the SCW were studied. Pure YAG phase was successfully synthesized at the alkaline condition in the SCW without formation of intermediate phases, while the size and luminescent property of YAG : Eu were strongly affected by pH condition. The luminescent intensity of YAG : Eu by the SCW method without further thermal treatment is stronger than that by the solid-state method with thermal treatment.
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