CaSiO_3:Eu的发光性质  

LUMINESCENT PROPERTIES OF CaSiO_3 : Eu

作　　者：于立新[1] 曹林[2] 杨殿范[1] 张东丽[1] 

机构地区：[1]吉林大学材料科学与工程学院,长春130026 [2]北京科技大学材料物理系,北京100083

出　　处：《硅酸盐学报》2003年第9期900-902,共3页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(40072013)

摘　　要：采用高温固相反应法合成出CaSiO_3:Eu^(3+)荧光体。研究了其荧光性质。样品的晶体结构为α-CaSiO_3和β-CaSiO_3的混合相,其激发光谱的峰位位于240,320,362,383,394,415 nm,分别对应于0→Eu的电荷迁移带和~7F_(0.1)—~5H_3,~5D_4,~5G_J,5~L_6,~5D_3的吸收跃迁。在240 nm和394 nm激发下,Eu^(3+)离子的~5D_0—~7F_2电偶极跃迁最强,表明Eu^(3+)离子占据更多的非反演中心格位。研究了不同电荷补偿剂对发光性能的影响,以Li^+离子的电荷补偿效果最好。Phosphors of CaSiO3 : Eu3+ sample were prepared by solid state reaction method at high temperature. Luminescent properties were studied. Crystal structure of samples are compound phases of α - CaSiO3 and β- CaSiO3. Peak sites of excita-tion spectrum locate at 240, 363, 383, 394 nm and 415 nm, originating from charge transfer band of O→Eu and absorption transition of 7F0.1-5H3 ,5D4 ,5GJ ,5L6,5D3. At excitation of 240 nm and 394 nm, electronic dipole transition locating at 609 nm origination from 5D0-7 F2 of Eu3+ ions is the strongest one. It shows that Eu3+ ions are located in more non-reversion cen-ter lattices. The effect of different compensation agents on luminescent properties are also studied. Compensation effect of Li+ ion is the optimum.

关 键 词：偏硅酸钙 铕离子 发光 电荷补偿 

分 类 号：TB321[一般工业技术—材料科学与工程]