Abstract In this paper, the (Y,Gd)2O3:Eu3+ superfine powders were prepared by co-precipitation method and ammonia was employed as precipitating agent. The means of XRD 、TEM、 SEM and DSC/TG were used to analyze the morphology and characteristics of the powders. The excitation spectrum and emission spectrum of the samples were analysed by the fluorophotometer. The results show that the powders are spherical particles with uniform size distribution of 20nm in the case of the powders were calcined at 800℃ for 2h. The sample has two excitation peaks at 235nm and 250nm when the monitoring wavelength is 612nm. The two peaks are caused by the Gd2O3 medium absorption and the CTS absorption of Eu3+ respectively. The intensity of the emission spectrum with the exciting at 235nm is higher than excited at 250nm. When the molar concentration of corporation Eu3+ is 3%, the emission peak of 5D0→7F2 transition states of the emission spectrum is the strongest, and when the corporation Eu3+ is 7%, intensity of the emission peak decreased, which is due to the concentration quenching.
[1]Ba X W,Bai C H,Zhang X Y.Mater Rev,2005;19(8): 25 (巴学巍，柏朝晖，张希艳．材料导报，2005；19(8)：25) [2]Steven J D,Charles D G,Robert J L,James S V,David M H,Robert J R,Michael J L.Nucl Instrum Methods Phys Res,2003;505A:68 [3]Kim Y K,Kim H K,Cho G,Kim D K.Nucl Instrum Methods Phys Res,2004;225B:392 [4]Chen Q W,Shi Y,Shi J L.J Mater Sci Eng,2005;23: 128 (陈启伟，施鹰，施剑林．材料科学与工程学报，2005；23：128) [5]Vu N,Anh T K,Yi G C,Streek W.J Lumin,2007;122- 123:776 [6]Fu Y P.J Mater Sci,2007;42:5165 [7]Bazzi R,Flores M A,Louis C,Lebbou K,Zhang W,Du- jardin C,Roux S,Mercier B,Ledoux G,Bernstein E,Per- fiat P,Tillement 0.J Colloid Interface Sci,2004;273: 191 [8]Silver J,Withrall R,Lipman A,Ireland T G,Fern G R.J Lumin,2007;122-123:562 [9]Joffin N,Dexpert-Ghys J,Verelst M,Baret G,Garcia A. J Lumin,2005;113:249 [10]Roh H S,Kang Y C,Park H D,Park S B.Appl Phys, 2003;76A:241 [11]Olivia A G,Jessica O.Opt Mater,2006;29:24 [12]Lee M H,Oh S G,Yi S C.J Colloid Interface Sci,2000; 226:65 [13]Xu X R,Su M Z.Luminescence and LuminesCence Mate- rials.Beijing:Chemical Industry Press,2004:307 (徐叙珞，苏勉曾．发光学与发光材料．北京：化学工业出版社，2004：307) [14]Sun J Y,Du H Y.Materials of Solid-State Luminescence. Beijing:Chemical Industry Press,2003:160 (孙家跃，杜海燕．固体发光材料．北京：化学工业出版社，2003：160)
