Abstract
Nano-size Y2O3 : Eu3+ powders were prepared via the thermal decomposition of yttrium carbonate coprecipitate precursors doped with europium. The carbonate precursor, which was synthesized with aging and milling, was fired at 800 °C in air. Consequently, the powder with average diameter of 36 nm was obtained. The relative fluorescence intensity due to the 5D0→7F2 transition of Eu3+ in Y2O3 sample with average diameter of 36 nm shows about 40% compared with that of commercial Y2O3 : Eu3+ phosphor with average particle diameter of 3.7 μm. The effect of ball-milling treatment during the aging of carbonate coprecipitated precursor on the preparation of nano-size Y2O3 : Eu3+ powders was discussed. Also, the effect of average diameter on the fluorescence intensity in nano-size Y2O3 : Eu3+ phosphor was discussed.
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