作　　者： ; ; ; ;

机构地区： 天津大学材料科学与工程学院先进陶瓷与加工技术教育部重点实验室

出　　处： 《中国稀土学报》 2008年第3期319-323,共5页

摘　　要： 采用高温熔融法制备了ZnO-P2O5∶Tb3+玻璃,并以热释光为手段,研究了基质组成、Tb3+掺杂浓度、熔制气氛、Tb3+与其他稀土离子共掺等因素对ZnO-P2O5∶Tb3+玻璃的发光中心、陷阱浓度及陷阱能级分布的影响。结果表明:ZnO含量的增加,使得与Zn2+配位的氧空位的数量增多,导致50~150℃低温区对应的陷阱浓度增加;还原气氛下,Tb3+掺杂后,一方面形成发光中心使得热释光强度提高,另一方面,可能由于不等价取代基质中的Zn2+离子产生新的缺陷使得陷阱能级加深;空气气氛下,大部分Tb3+被氧化成Tb4+,发光中心浓度降低;Ce3+,Eu3+,Dy3+,Nd3+,Pr3+和Er3+与Tb3+共掺时,陷阱能级深度与陷阱中心的电荷密度发生了不同程度的变化。 ZnO-PzO5 glasses doped with Tb^3＋ ion were prepared by high temperature melting method. The variation of luminescence centre, traps concentration and distribution which caused by matrix composition, concentration of Tb^3＋ ion, melting atmosphere, and codoping with other rare earth ions were studied. The results showed that： the oxygen vacancy coordinated with Zn^2＋ was increased with the concentration of ZnO, which leaded to the increasing of the electron traps corresponding to 50-150℃. When Tb^3＋ was introducted, the TL intensity increased by lumines-cence centre Tb^3＋, and another kind of trap was formed at the same time, and Zn^2＋ were replaced by Tb^3＋ unequivatent possibly. When the sample was burned in the air atmosphere, Tb^3＋ was oxidized to Tb^4＋ , and the TL intensity is weakened because of de-creasing luminescence centre. When Ce^3＋ , Eu^3＋ , Dy^3＋, Nd^3＋, Pr^3＋ and Er^3＋ were codoped with Tb^3＋ respectively, the depth of energy level and the charge density captured by electron traps center had different changes due to the ions-codoping.

关 键 词： 热释光 发光中心 陷阱 稀土

领　　域： [理学] [理学] [理学] [理学]