Preparation and luminescence property of (Y,Gd)₂O₃: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°C for 2h has an average particle size of 50 nm. The specific surface area of the weakly agglomerate powder is about 23 m²/g. Its X-ray excited luminescence is much stronger than that of the powder prepared by oxalate precipitation processing.