红色荧光粉γ-LiAlO_2:Eu^(3+)的溶胶-凝胶法制备及发光性能(英文)  

SYNTHESIS OF γ-LiAlO_2:Eu^(3+) BY SOL-GEL METHOD AND ITS LUMINESCENCE PROPERTIES

作　　者：吉红新[1] 杨定明[1] 胡文远[1] 谢礼梅[1] 叶旭[1] 

机构地区：[1]西南科技大学四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地,四川绵阳621010

出　　处：《硅酸盐学报》2010年第10期2030-2034,共5页Journal of The Chinese Ceramic Society

基　　金：西南科技大学博士基金(08zx0103)资助项目

摘　　要：采用溶胶-凝胶法合成了γ-LiAlO2:Eu3+红色荧光粉,用X射线衍射、扫描电子电镜、荧光光度计对样品进行了结构、形貌及发光性能表征。结果表明:Eu3+最佳掺杂量以摩尔计为2%,样品γ-LiAlO2:2%Eu3+为四方晶系结构,样品平均粒径为1μm左右,呈片状。荧光体的最大激发峰λex=254nm,属于宽带激发,最大发射峰λem=613nm,对应于Eu3+离子的5D0→7F2跃迁。Eu3+在LiAlO2晶格中主要占据非对称中心格位。γ-LiAlO2：Eu^3＋ phosphor powder was prepared by sol-gel method.Its structure,morphology and luminescence were characterized by X-ray diffraction,scanning electron microscopy,fluorescence spectrophotometer.The results show that the optimal doping content of Eu^3＋ is 2% in mole,the γ-LiAlO2：2%Eu^3＋powder has tetragonal structure,and is flaky with an average particle size of about 1 μm.The strongest excitation peak at 254 nm of the powder belongs to the broadband excitation,and the maximum emission peak at 613 nm corresponds to the 5D0→7F2 transition of Eu^3＋.Eu^3＋ ions mainly occupy non-central symmetric position in LiAlO2 lattice.

关 键 词：溶胶-凝胶法 红色荧光粉 铝酸锂 铕 稀土 

分 类 号：O482.3[理学—固体物理]