Preparation and Luminescence Property of (Y,Gd)_2O_3:Eu Nanopowder by Complex Precipitation

(Y,Gd)2O3:Eu phosphors were prepared by the complex precipitation processing using the mixture of ammonium water and ammonium hydrogen carbonate as complex precipitant. TG-DSC, FT-IR, XRD, SEM, TEM were used to characterize the as prepared phosphors. The Eu2O3 concentration and calcining temperature have distinctly influence on the X-ray excited luminescence of the as prepared powders. The resulted (Y,Gd)2O3:Eu powder calcined at 850℃ for 2h has an average particle size of 50nm. The specific surface area of the weakly agglomerate powder is about 23m2/g. Its X-ray excited luminescence is much stronger than that of the powder prepared by oxalate precipitation processing.