摘要
本研究针对掺杂Zr元素(5%(摩尔分数))的(Y,Gd,Zr)_(2)O_(3+δ):Eu(YGO:Eu)纳米粉体和真空烧结透明陶瓷,研究Eu^(3+)和Gd^(3+)掺杂含量对粉体发光性能影响,以及Gd^(3+)掺杂含量对透明陶瓷相结构、光学性能和发光性能的影响。结果表明:在Eu^(3+)掺杂含量为5%(原子分数)时,调节Gd^(3+)掺杂含量可进一步改善[(Y_(0.95-y)Gd_(y)Zr_(0.05))_(0.95)Eu_(0.05)]_(2)O_(3+δ)粉体和陶瓷的性能。当0.25≤y≤0.5时,陶瓷保持立方结构并在y=0.3时实现了最高光学透过率。在激发波长λ_(ex)=466 nm激发下,[(Y_(0.95-y)Gd_(y)Zr_(0.05))_(0.95)Eu_(0.05)]_(2)O_(3+δ)(y=0.3)陶瓷的^(5)D_0→^(7)F_(2)发射强度是[(Y_(0.95-y)Gd_(y)Zr_(0.05))_(0.95)Eu_(0.05)]_(2)O_(3+δ)(y=0.25)陶瓷的4.41倍。在监测波长λ_(em)=612 nm下,[(Y_(0.95-y)Gd_(y)Zr_(0.05))_(0.95)Eu_(0.05)]_(2)O_(3+δ)(y=0.3)陶瓷的激发强度(PLE)达到最大值。随着Gd^(3+)含量增加,电荷迁移带(CTB)红移,陶瓷的4f→4f跃迁强度高于CTB强度,并且在396和466 nm处的能级跃迁与近紫外和蓝光LED芯片的发射波长相匹配,表明[(Y_(0.95-y)Gd_(y)Zr_(0.05))_(0.95)Eu_(0.05)]_(2)O_(3+δ)透明陶瓷可用于白光LED领域。
In this study,(Y,Gd,Zr)_(2)O_(3+δ):Eu(YGO:Eu)transparent ceramics were prepared by solid-phase synthesis of powders combined with vacuum sintering.The influence of Eu^(3+)and Gd^(3+)doping content on the phase structure,optical properties,and luminescent properties of powders and ceramics were systematically studied.The results exhibit that when the Eu^(3+)doping content is 5%,the properties of[(Y_(0.95-y)Gd_(y)Zr_(0.05))_(0.95)Eu_(0.05)]_(2)O_(3+δ)(y=0.25~0.95)powders and ceramics can be improved by further adjusting the doping amount of Gd^(3+).The ceramic maintains a cubic structure when the content of Gd^(3+)is 0.25≤y≤0.5 and the highest optical transmittance is achieved at y=0.3.Under the excitation ofλ_(ex)=466 nm,the^(5)D_0→^(7)F_(2) emission intensity of[(Y_(0.95-y)Gd_(y)Zr_(0.05))_(0.95)Eu_(0.05)]_(2)O_(3+δ)(y=0.3)ceramic intensity is higher than that of[(Y_(0.95-y)Gd_(y)Zr_(0.05))_(0.95)Eu_(0.05)]_(2)O_(3+δ)(y=0.25)ceramic.Atλ_(em)=612 nm,the PLE(photoluminescence excitation)intensity of the[(Y_(0.95-y)Gd_(y)Zr_(0.05))_(0.95)Eu_(0.05)]_(2)O_(3+δ)(y=0.3)ce‐ramic reaches the maximum.With the increase of Gd^(3+)content,charge transfer band(CTB)red shifts.The 4f→4f transition intensity of ceramics is higher than that of CTB,and the energy level transition at 396 and 466 nm matches the emission wavelength of near-ultraviolet and blue LED chips,indicating that[(Y_(0.95-y)Gd_(y)Zr_(0.05))_(0.95)Eu_(0.05)]_(2)O_(3+δ)(y=0.3)transparent ceramic can be used in the white LED field.
作者
张哲
任轶
张舒云
穆浩洁
李晓东
孙旭东
Zhang Zhe;Ren Yi;Zhang Shuyun;Mu Haojie;Li Xiaodong;Sun Xudong(School of Materials Science and Engineering,Key Laboratory for Anisotropy and Texture of Materials Ministry of Education,Northeastern University,Shenyang 110819,China;Foshan Graduate School,Northeastern University,Foshan 528311,China)
出处
《中国稀土学报》
EI
CAS
CSCD
北大核心
2024年第5期909-917,I0003,共10页
Journal of the Chinese Society of Rare Earths
基金
国家重点研发计划项目(2017YFB0310300)资助。
关键词
透明陶瓷
氧化钇
氧化钆
发光性能
烧结助剂
transparent ceramics
yttria
gadolinia
photoluminescent property
sintering additive
