Ce3+∶GdLu2Al5O12/Al2O3共晶微结构及其发光性能

人工晶体学报 ›› 2021, Vol. 50 ›› Issue (10): 1963-1970.

Ce³⁺∶GdLu₂Al₅O₁₂/Al₂O₃共晶微结构及其发光性能

邹征刚¹, 刘振², 龚国亮¹, 孙益坚¹, 温和瑞¹, 钟玖平²

1.江西理工大学化学化工学院,赣州 341000;
2.中山大学材料学院,深圳 518107

收稿日期:2021-08-13 出版日期:2021-10-15 发布日期:2021-11-24
通讯作者: 温和瑞,博士,教授。E-mail:wenherui63@163.com。钟玖平,博士,副教授。E-mail:zhongjp@mail.sysu.edu.cn
作者简介:邹征刚(1993—),男,江西省人,博士研究生。E-mail:zouzhenggang15@163.com。温和瑞(1963—),男,理学博士,现任江西理工大学校长、二级教授、博士生导师,中国化学会晶体化学专业委员会委员。主要研究方向为功能分子材料化学、稀土功能晶体材料等。主持承担国家自然科学基金委、江西省创新驱动“5511”工程重大研发专项等项目。获评“全国优秀教师”、江西省高校中青年学科带头人、江西省“百千万人才工程”人选、“赣鄱英才555工程”领军人才等。曾获国家教学成果二等奖、江西省自然科学二等奖等奖项。在Chemical Communications、Inorganic Chemistry、Journal of Materials Chemistry C、Dalton Transactions等国际重要学术期刊发表SCI论文100余篇,论文他引千余次。钟玖平(1975—),男,理学博士,中山大学材料学院副教授,博士生导师,兼任中国硅酸盐学会晶体生长与材料分会理事、中国稀土学会稀土晶体材料专业委员会委员、《人工晶体学报》第七届编委。主要研究方向为稀土光电晶体生长与发光物理、新型稀土荧光材料合成与发光性能。承担了国家自然科学基金、中国博士后科学基金、广东省科技计划项目、国际科技合作项目等科技项目,在Nanoscale、Journal of Materials Chemistry、Crystal Growth & Design、Inorganic Chemistry、Journal of Crystal Growth、Physical Review B、Journal of Physical Chemistry C等国内外刊物上发表学术论文五十余篇。
基金资助:
江西省重点研发计划(20165ABC28010);江西省教育厅科技项目(GJJ190430);赣州市科技计划项目(赣市科发[2019]60号,赣市科发[2020]60号)

Microstructure and Luminescence Properties of Ce³⁺ Doped GdLu₂Al₅O₁₂/Al₂O₃ Eutectic

ZOU Zhenggang¹, LIU Zhen², GONG Guoliang¹, SUN Yijian¹, WEN Herui¹, ZHONG Jiuping²

1. School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;
2. School of Materials, Sun Yat-Sen University, Shenzhen 518107, China

Received:2021-08-13 Online:2021-10-15 Published:2021-11-24

摘要/Abstract

摘要： 稀土共晶闪烁体是通过定向凝固晶体生长技术,将具有不同折射率的两相制备成具有射线探测功能的共晶材料,其中含有激活离子的闪烁体相的折射率高于基质相。在高能射线辐照下,闪烁体相将入射高能射线转换成荧光,然后,荧光在闪烁体相和基底相的界面以全反射的形式实现定向输出,从而有效提高辐射探测成像的空间分辨率。本工作采用微下降法成功生长得到φ3 mm×117.0 mm 的1.0%(原子数分数)Ce∶GdLu₂Al₅O₁₂/Al₂O₃闪烁共晶样品。通过切割抛光加工得到φ3 mm×2.0 mm的共晶薄片,并将该共晶薄片进行微观结构、能谱分析和荧光性能等表征和测试,结果表明所得到的共晶样品由Ce∶GdLuAG和Al₂O₃两晶相构成,微观结构呈现出“中国结”结构,并在生长方向呈现出一定的有序排列。荧光光谱测试表明该共晶材料存在Gd³⁺-Ce³⁺间的能量传递,具有典型的Ce³⁺辐射跃迁,其中双宽峰发射峰最强位于560 nm。此外,根据生长速率对共晶样品发射峰强、峰位以及荧光寿命影响,优化出最佳下拉生长速率为4.0 mm/min。

关键词: 共晶, Ce掺杂, 微下降法, GdLu₂Al₅O₁₂, Al₂O₃, 闪烁晶体, 晶体生长, 微结构

Abstract: Rare earth scintillation eutectic is a kind of radioluminescence material including two crystallographic phases with different refractive index prepared by directional solidification. The refractive index of the scintillator phase doped with active ions is higher than that of the matrix phase. Under the irradiation of high-energy rays, the scintillation light can be generated in the scintillation phase, and then the scintillation light is transmitted and output in total reflection at the interface between scintillator phase and matrix phase, thus effectively improving the spatial resolution of radiation detection imaging through directional propagation. In this work, 1.0%(atomic fraction) Ce:GdLu₂Al₅O₁₂/Al₂O₃eutectic with the size of φ3 mm×117.0 mm was successfully grown by micro-pulling-down method. The φ3 mm×2.0 mm thin eutectic slices were obtained by cutting and polishing, and then were used to be tested for microstructure, energy spectrum and fluorescence properties analysis. It is confirmed that the eutectic is composed of Ce:GdLuAG and Al₂O₃ by XRD, SEM and EDS determination. There is a certain ordered arrangement in the growth direction. The fluorescence spectra show that the eutectic material has energy transfer between Gd³⁺-Ce³⁺, and has a typical Ce³⁺ radiation transition, in which the double broad emission peak is the strongest at 560 nm. In addition, according to the effects of pulling speed on the emission peak intensity, peak position and fluorescence lifetime, the growth rate was optimized to be 4.0 mm/min.

Key words: eutectic, Ce doped, micro-pulling-down method, GdLu₂Al₅O₁₂, Al₂O₃, scintillation crystal, crystal growth, microstructure

中图分类号:

O734

邹征刚, 刘振, 龚国亮, 孙益坚, 温和瑞, 钟玖平. Ce³⁺∶GdLu₂Al₅O₁₂/Al₂O₃共晶微结构及其发光性能[J]. 人工晶体学报, 2021, 50(10): 1963-1970.

ZOU Zhenggang, LIU Zhen, GONG Guoliang, SUN Yijian, WEN Herui, ZHONG Jiuping. Microstructure and Luminescence Properties of Ce³⁺ Doped GdLu₂Al₅O₁₂/Al₂O₃ Eutectic[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(10): 1963-1970.

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Ce³⁺∶GdLu₂Al₅O₁₂/Al₂O₃共晶微结构及其发光性能

Microstructure and Luminescence Properties of Ce³⁺ Doped GdLu₂Al₅O₁₂/Al₂O₃ Eutectic

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