Synthesis of(Sr,Eu)CO_3@SiO_2 core-shell-like precursor for alkali earth silicate phosphors  

作　　者：胡运生 郝建华 庄卫东 黄小卫 何华强 

机构地区：[1]National Engineering Research Center for Rare Earth Materials,General Research Institute for Nonferrous Metals,and Grirem Advanced Materials Co.,Ltd. [2]Department of Applied Physics,The Hong Kong Polytechnic University

出　　处：《Journal of Rare Earths》2011年第10期911-914,共4页稀土学报（英文版）

基　　金：supported by the National Hi-Tech R&D Program of China (863 Program, 2010AA03A404, 2011AA03A101);Beijing Natural Science Foundation (2102022);the Hong Kong Polytechnic University Grant (J-BB9R)

摘　　要：Monodisperse （Sr, Eu）CO3 sphere （the homogenous mixture of Sr2＋ and Eu3＋ carbonates） was firstly prepared, and then its surface was coated by amorphous SiO2 in the presence of cationic surfactant cetyltrimethylammonium bromide （CTAB） to form （Sr, Eu）CO3@SiO2 core-shell-like precursor. The overall synthesized mechanism was investigated and proposed based on the Fourier transform infrared spec- troscopy （FTIR）, X-ray diffraction （XRD） and scanning electron microscopy （SEM）. This strategy could be applied to construct core-shell structured precursors for the preparation of alkali earth silicate phosphors.Monodisperse （Sr, Eu）CO3 sphere （the homogenous mixture of Sr2＋ and Eu3＋ carbonates） was firstly prepared, and then its surface was coated by amorphous SiO2 in the presence of cationic surfactant cetyltrimethylammonium bromide （CTAB） to form （Sr, Eu）CO3@SiO2 core-shell-like precursor. The overall synthesized mechanism was investigated and proposed based on the Fourier transform infrared spec- troscopy （FTIR）, X-ray diffraction （XRD） and scanning electron microscopy （SEM）. This strategy could be applied to construct core-shell structured precursors for the preparation of alkali earth silicate phosphors.

关 键 词：core-shell structure PRECURSOR formation mechanism PHOSPHOR rare earths ] 

分 类 号：TM923.04[电气工程—电力电子与电力传动]