发光学报, 2017, 38 (3): 269, 网络出版: 2017-04-10
Eu3+掺杂5Li2O-1Nb2O5-5TiO2发光陶瓷的制备及性能研究
Preparation and Properties of Eu-doped 5Li2O-1Nb2O5-5TiO2 Ceramics
摘要
以Li2CO3、Nb2O5、TiO2和Eu2O3为原料, 采用固相法制备Eu3+掺杂的5Li2CO3-1Nb2O5-5TiO2(LNT)发光介质陶瓷。通过密度、XRD和荧光光谱测试, 对0.2%(质量分数)Eu2O3掺杂的陶瓷片进行性能表征。结果表明: 1 120 ℃烧结致密的陶瓷片, 其晶相结构为“M-相”与Li2TiO3两相复合构成; 在400 nm的近紫外光激发下, 样品有较强的橙光(592 nm)和红光(615 nm)发射, 分别属于Eu3+的5D0→7F1的磁偶极跃迁和5D0→7F2的电偶极跃迁。
Abstract
Eu-doped 5Li2O-1Nb2O5-5TiO2 (LNT) luminescent dielectric ceramics were synthesized by solid state reaction method with Li2CO3, Nb2O5, TiO2 and Eu2O3 as raw materials. The properties of LNT∶0.2%Eu3+(mass fraction)ceramics were characterized by density test, X-ray diffraction(XRD) and photoluminescence spectroscopy, respectively. The XRD results show that the ceramics sintered at 1 120 ℃ consist of ‘M- phase’ and Li2TiO3 solid solution, no other miscellaneous phase. Under 400 nm excitation, strong red-orange luminescence can be observed. The red emission at 615 nm belonging to 5D0→7F2 transition is an electric dipole transition, while the orange emission at 592 nm corresponding to 5D0→7F1 transition is a typical magnetic dipole allowed transition.
王飞, 周志勇, 曾群, 周鹤, 姚春凤. Eu3+掺杂5Li2O-1Nb2O5-5TiO2发光陶瓷的制备及性能研究[J]. 发光学报, 2017, 38(3): 269. WANG Fei, ZHOU Zhi-yong, ZENG Qun, ZHOU He, YAO Chun-feng. Preparation and Properties of Eu-doped 5Li2O-1Nb2O5-5TiO2 Ceramics[J]. Chinese Journal of Luminescence, 2017, 38(3): 269.