无机材料学报 ›› 2021, Vol. 36 ›› Issue (8): 789-806.DOI: 10.15541/jim20200544 CSTR: 32189.14.10.15541/jim20200544

• 综述 • 上一篇    下一篇

稀土离子掺杂Gd2O2S闪烁陶瓷的研究进展

李江1(), 丁继扬1,2, 黄新友2   

  1. 1.中国科学院 上海硅酸盐研究所, 透明光功能无机材料重点实验室, 上海 201899
    2.江苏大学 材料科学与工程学院, 镇江 212013
  • 收稿日期:2020-09-17 修回日期:2020-12-07 出版日期:2021-08-20 网络出版日期:2021-03-01
  • 作者简介:李 江(1977-), 男, 研究员. E-mail: lijiang@mail.sic.ac.cn
  • 基金资助:
    国家重点研发计划项目(2017YFB0310500);中国科学院前沿基础重点项目(QYZDB-SSW-JSC022)

Rare Earth Doped Gd2O2S Scintillation Ceramics

LI Jiang1(), DING Jiyang1,2, HUANG Xinyou2   

  1. 1. Key Laboratory of Transparent Opto-Functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China
    2. School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
  • Received:2020-09-17 Revised:2020-12-07 Published:2021-08-20 Online:2021-03-01
  • About author:Li Jiang(1977-), male, professor. E-mail: lijiang@mail.sic.ac.cn
  • Supported by:
    National Key R&D Program of China(2017YFB0310500);Key Research Project of the Frontier Science of the Chinese Academy of Sciences(QYZDB-SSW-JSC022)

摘要:

稀土离子掺杂Gd2O2S闪烁陶瓷是20世纪80年代以后发展的硫氧化物闪烁体。高密度和高热中子吸收截面的Gd2O2S基质具有高的X射线和热中子阻止能力, 稀土离子(Pr3+、Tb3+等)的掺杂使其表现出快衰减或高光产额等特性, 在闪烁领域的应用中占据着重要地位。硫氧化合物的组分控制一直是其合成过程中需要解决的关键问题, Gd2O2S材料的高熔点和S元素挥发严重的问题, 限制了高光学质量和优良闪烁性能单晶的制备, 因此陶瓷是Gd2O2S闪烁体的主要应用形式。颗粒小、粒径分布窄且低团聚的纯相Gd2O2S粉体是高质量闪烁陶瓷烧结的关键, 单纯提高烧结温度制备的Gd2O2S闪烁陶瓷会产生大量的硫空位和氧空位, 降低材料的闪烁性能。制备Gd2O2S闪烁陶瓷通常需要压力辅助烧结, 这种苛刻的制备条件提高了生产成本。本文介绍了闪烁体的闪烁机理及研究概况, 着重综述了Gd2O2S闪烁陶瓷的制备工艺、缺陷的解决方法以及在中子成像和医学X-CT上的研究现状及应用情况, 最后对全文进行总结并对Gd2O2S闪烁陶瓷发展前景进行了展望。

关键词: Gd2O2S闪烁陶瓷, 可控制备, 缺陷控制, 中子成像, 医学X-CT, 综述

Abstract:

Rare earth ions doped Gd2O2S scintillators are new type of oxysulfide scintillators, which have been developed since 1980s. The Gd2O2S matrix with cross section of high density and high thermal neutron absorption has high X ray and thermal neutron stopping capacity. The doping of different rare earth ions (Pr3+, Tb3+, etc.) shows fast decay or high light yield, which plays a very important role in application of scintillation. Composition control of oxysulfide is always a key problem to be solved in the synthesis process. However, the high melting point of Gd2O2S material and the serious volatilization of sulfur restrict the preparation of Gd2O2S single crystals, with high optical quality and excellent scintillation performance. Ceramic is the main application form of Gd2O2S scintillation material. Its pure phase Gd 2O2S phosphors with small particle size, narrow particle size distribution and low agglomeration is the key to sintering high quality scintillation ceramics. These ceramics prepared by simply increasing the sintering temperature produce a large number of sulfur vacancies and oxygen vacancies, decreasing the scintillation properties. Therefore, preparation of Gd2O2S scintillation ceramics usually need pressure assistance to increase the production cost. In this paper, their scintillation mechanism and research situation are introduced firstly. Then, their fabrication process, solution of defects removal, research status and applications in neutron imaging and medical X-CT fields are overviewed. Finally, we summarized the previous and prospected the future development of Gd2O2S scintillation ceramics.

Key words: Gd2O2S scintillation ceramics, controllable fabrication, defects control, neutron imaging, medical X-CT, review

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