Eu^(3+)在Ba_2TiSi_2O_8中的发光  

Luminescence of Eu^(3+) in Ba_2TiSi_2O_8

作　　者：万霞[1] 丘尽花[1] 铁绍龙[1] 

机构地区：[1]华南师范大学化学与环境学院,广州510631

出　　处：《无机化学学报》2007年第5期857-861,共5页Chinese Journal of Inorganic Chemistry

基　　金：广东省自然科学基金(No.031505)资助项目。

摘　　要：红色荧光材料主要有(碱土)硫化物体系[1,2],(碱土)钛酸盐体系[3,4],氧化稀土体系[5],硅酸盐体系[6]以及其它氧化物体系如MO∶Eu^(3+)(M=Ca、Sr、Ba)[7],SrAl2O4∶Eu^(2+)[8]等。在这些体系中。The barium titano-silicate phosphors doped with Eu^3＋ were synthesized by high temperature solid state reaction. The structures of as-synthesized samples were characterized by powder XRD. The maximum peaks of emission spectra of Ba2TiSi2Os and Ba2TiSi2Os：Eu^3＋ were respectively located at 450 and 618 nm, coming from the transitions of charge-transfer bands of Ti^4＋-O^2- and forced electric-dipole transition 5Do-^7F2 of Eu^3＋. The luminous mechanisms of Ba2TiSi2O8 and Ba2TiSi2Os ：Eu^3＋ were suggested. The effects of concentration of Eu^3＋ on the luminous performance of Ba2TiSi2Os：Eu^3＋ were also studied and the results showed that the optimum concentration of Eu^3＋ was 0.12 mol per mole of matrix.

关 键 词：硅钛酸盐 高温固相扩散法 EU^3+ 发光 荷移跃迁 

分 类 号：O614[理学—无机化学]