Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

Nanosized and aggregated Y₂O₃:Eu Red phosphors were prepared by template method from metal salt impregnated into crystalline cellulose. The particle size and photoluminescent property of Y₂O₃:Eu red phosphors were controlled by variation of the calcination temperature and time. Dispersed nanosol was also obtained from the aggregated Y₂O₃:Eu Red phosphor under bead mill wet process. The dispersion property of the Y₂O₃:Eu nanosol was optimized by controlling the bead size, bead content ratio and milling time. The median particle size (D₅₀) of Y₂O₃:Eu nanosol was found to be around 100 nm, and to be below 90 nm after centrifuging. In spite of the low photoluminescent properties of Y₂O₃:Eu nanosol, it was observed that the photoluminescent property recovered after re-calcination. The dispersion and photoluminescent properties of Y₂O₃:Eu nanosol were investigated using a particle size analyzer, FE-SEM, and a fluorescence spectrometer.