| BaMAl10O17(M=Be,Mg,Ca,Zn,Cd,Mn,Co,Li)体系的合成、结构和Eu2+在其中的发光 |
| Preparation, Structure and Luminescence of BaMAl10O17:Eu2+(M=Be, Mg, Ca, Zn, Cd, Mn, Co, Li) System |
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| 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βAl2O3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,B |
| 关键词: 铕 多铝酸盐 结构 发光 |
| 基金项目: 广东省自然科学基金(No.970613);国务院侨办基金(939540);稀土化学与物理开放实验室资助项目 |
| Abstract: 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 Mis Mg, Zn, Mn, Co, Li, there exists the structure of β-Al2O3 for BaMAl10O17 system, and when Mindicates Cd, β-Al2O3 structure is formed accompanying α-Al2O3 phase, and when Mrepresents 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 Mion 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 Mis Li, Be, Zn, Eu2+activator produces an emission of nearly 450 nm with half height width about 50 nm, when Mis Mn, there are simultaneously the emissions of Eu2+ and Mn2+ and the excitation energy of Eu2+can transfer to Mn2+in the host, when Mis 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. |
| Keywords: europium(Ⅱ) polyaluminates of barium structure luminescence |
| 投稿时间：1999-04-23 修订日期：1999-07-05 |
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| 刘应亮,冯德雄,徐如海,杨培慧,石春山.BaMAl10O17(M=Be,Mg,Ca,Zn,Cd,Mn,Co,Li)体系的合成、结构和Eu2+在其中的发光[J].无机化学学报,2000,16(1):63-67. |
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