BaMAl_(10)O_(17)(M=Be,Mg,Ca,Zn,Cd,Mn,Co,Li)体系的合成、结构和Eu^(2+)在其中的发光  

Preparation, Structure and Luminescence of BaMAl_(10)O_(17):Eu^(2+)(M=Be, Mg, Ca, Zn, Cd, Mn, Co, Li) System

作　　者：刘应亮[1] 冯德雄[1] 徐如海 杨培慧[1] 石春山[2] 

机构地区：[1]暨南大学化学系,广州510632 [2]中国科学院长春应用化学研究所稀土化学与物理实验室,长春130022

出　　处：《无机化学学报》2000年第1期63-67,共5页Chinese Journal of Inorganic Chemistry

基　　金：广东省自然科学基金!(No.970613);国务院侨办基金!(93 95 40);稀土化学与物理开放实验室资助项目

摘　　要：在BaMAl10O17 体系中 ,将M扩大到除镁以外的其它离子 ,研究和讨论了离子半径与基质结构的形成关系 ,提出能稳定(形成)尖晶石结构的M离子有相应的磁铅矿或β Al2O3 结构的化合物存在的思想 ,并研究了Eu2 +在体系中的发光性能。结果表明 ,M=Zn,Cd,Mn,Co,Li时可形成 β Al2O3 结构化合物 ,M=Ca,Be时不能形成这类结构 ,Ca形成多相共存 ,Be形成一未知相 ;Eu2 +在M=Li,Be,Zn体系中具有良好的发光性能 ,发射波长450nm ,半高宽在50nm附近 ,将是一类很有前途的新的蓝色发光材料 ,Eu2 +在M=Mn的体系中存在Eu2 +和Mn2 +的同时发射 ,在M=Cd体系中 ,Eu2 +产生一双重宽带发射。The BaMAl10O17 (M= Be, Mg, Ca, Zn, Cd, Mn, Co, Li) system has been synthesized by solid state method and characterized by XRD. The results show that when M is Mg, Zn, Mn, Co, Li, there exists the structure of β Al2O3 for BaMAl10O17 system, and when M indicates Cd, β Al2O3 structure is formed accompanying α Al2O3 phase, and when M represents Be and Ca, β Al2O3 structure cannot be formed. This demonstrates that the condition forming β Al2O3 structure compounds for the system BaMAl10O17 is 0.05nm< RM < 0.09nm(RM represents the radius of M).The thought that if a M ion can form a stable spinel structure there exsits a corresponding magnetoplumbite and β alumina structure is proposed for BaMAl10O17 system according to the experimental results. When M is Li, Be, Zn, Eu2+activator produces an emission of nearly 450 nm with half height width about 50 nm, when M is Mn, there are simultaneously the emissions of Eu2+and Mn2+and the excitation energy of Eu2+can transfer to Mn2+in the host, when M is Cd, Eu2+displays a double emission band, which can be explained by the Jahn Teller's effect. It is possible for the system BaMAl10O17 with M being Li, Be, Zn to become blue emitting component in three colour lamp through further study.

关 键 词：铕 多铝酸盐 结构 发光性能 

分 类 号：O614.338[理学—无机化学] O614.31[理学—化学]