Influence of LiF contents on the microstructure and optical properties of Gd2O2S:Tb scintillation ceramics

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2025-08-24 DOI:10.1016/j.optmat.2025.117439

Junlin Wu , Dong Huang , Chen Hu , Tingsong Li , Wenqin Yang , Xingfen Jiang , Jianrong Zhou , Zhijia Sun , Jiang Li

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引用次数: 0

Abstract

The Gd₂O₂S:Tb scintillation ceramics with different LiF contents were fabricated by hot pressing and hot isostatic pressing post-treatment from the powders synthesized by the water-bath method. The influence of LiF contents on the microstructure, optical properties of Gd₂O₂S:Tb ceramics was systematically investigated. The liquid-phase sintering formed by the introduction of LiF promotes the expulsion of pores within the ceramic. However, the grain sizes of the Gd₂O₂S:Tb ceramics increase with the increase of LiF contents. The Gd₂O₂S:Tb ceramics (1 mm in thickness) with 0.05 wt% LiF shows the highest total optical transmittance of 18.3 % at 545 nm. When the LiF content is 0.05 wt%, the Gd₂O₂S:Tb ceramics has the highest XEL intensity, the shortest PL decay time of 562 μs and the lowest afterglow intensity of 0.01 %@50 ms. The combination of first principal calculations and experimental results demonstrate that the introduction of an appropriate amount of F^- in Gd₂O₂S:Tb ceramics can effectively reduce the defect concentration.

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LiF含量对Gd2O2S:Tb闪烁陶瓷显微结构和光学性能的影响

以水浴法合成的粉末为原料，经热压和热等静压后处理制备了不同liff含量的Gd2O2S:Tb闪烁陶瓷。系统研究了LiF含量对Gd2O2S:Tb陶瓷显微结构和光学性能的影响。引入LiF形成的液相烧结促进了陶瓷内部孔隙的排出。随着LiF含量的增加，Gd2O2S:Tb陶瓷的晶粒尺寸增大。在545 nm处，厚度为1mm， LiF为0.05 wt%的Gd2O2S:Tb陶瓷的总透过率最高，为18.3%。当LiF含量为0.05 wt%时，Gd2O2S:Tb陶瓷的XEL强度最高，PL衰减时间最短，为562 μs，余辉强度最低，为0.01% @50 ms。首次原理计算与实验结果相结合表明，在Gd2O2S:Tb陶瓷中加入适量的F-可以有效降低缺陷浓度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.