Effect of Gd Content on Luminescence Properties of Eu3+-Doped La2−xGdxZr2O7 Transparent Ceramics
Effect of Gd Content on Luminescence Properties of Eu3+-Doped La2−xGdxZr2O7 Transparent Ceramics
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DOI：
10.1111/jace.13632
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发表时间：
2015-08
影响因子：
3.9
通讯作者：
Zhengjuan Wang;Guohong Zhou;Jian Zhang;X. Qin;Fang Zhang;Jianping Ai;Shiwei Wang
中科院分区：
文献类型：
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作者：
Zhengjuan Wang;Guohong Zhou;Jian Zhang;X. Qin;Fang Zhang;Jianping Ai;Shiwei Wang
采用真空烧结法制备了3at.%Eu3+掺杂的La_2-−_xGd_xZr_2O_7(x=0-2.0)透明陶瓷。研究了Gd含量对陶瓷的晶体结构、在线透过率和发光性能的影响。陶瓷均为立方烧绿石结构，透明度高。陶瓷透过率曲线的截止边缘随Gd含量的变化而变化，并受退火工艺的影响。在空气中退火后，陶瓷的发光强度增强。随着Gd含量的增加，陶瓷的能带结构和发光行为发生变化，晶格对称性降低，导致最强发光峰从585 nm移动到630 nm左右。
3 at.% Eu3+-doped La2−xGdxZr2O7 (x = 0–2.0) transparent ceramics were fabricated by vacuum sintering. The effect of Gd content on crystal structure, in-line transmittance, and luminescence property of the ceramics were investigated. The ceramics are all cubic pyrochlore structure with high transparency. The cut-off edge of the transmittance curve of the ceramics varied with Gd content and was also affected by the annealing process. The luminescence intensity became stronger for the ceramics annealed in air. As Gd content increased, the energy band structure as well as the luminescence behavior of the ceramics was changed; in addition, the symmetry of the crystal lattice reduced, resulting in the shift of the strongest luminescence peak from 585 nm to around 630 nm.