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人工晶体学报 ›› 2025, Vol. 54 ›› Issue (12): 2119-2126.DOI: 10.16553/j.cnki.issn1000-985x.2025.0134

• 研究论文 • 上一篇    下一篇

压力辅助烧结Gd2O2S∶Tb闪烁陶瓷的微结构及性能研究

吴俊林1,2(), 黄东1, 胡辰1,2(), 李廷松1, 杨文钦3,4, 蒋兴奋3,4, 周健荣3,4, 孙志嘉3,4, 李江1,2()   

  1. 1.中国科学院上海硅酸盐研究所,关键陶瓷材料全国重点实验室,上海 201899
    2.中国科学院大学材料科学与光电工程中心,北京 100049
    3.散裂中子源科学中心,东莞 523803
    4.中国科学院高能物理研究所,北京 100049
  • 收稿日期:2025-06-23 出版日期:2025-12-20 发布日期:2026-01-04
  • 通信作者: 胡辰,副研究员。E-mail:huchen@mail.sic.ac.cn;李江,研究员。E-mail:lijiang@mail.sic.ac.cn
  • 作者简介:吴俊林(1998—),男,湖北省人,博士研究生。E-mail:wujunlin20@mails.ucas.ac.cn
  • 基金资助:
    新材料重大专项项目(2024ZD0605900);国家自然科学基金(12175254);中国科学院国际合作局未来伙伴网络专项(030GJHZ2024026FN);广东省高精度射线探测技术重点实验室(2024B1212010005)

Microstructure and Properties of Gd2O2S∶Tb Scintillation Ceramics Fabricated by Pressure-Assisted Sintering

WU Junlin1,2(), HUANG Dong1, HU Chen1,2(), LI Tingsong1, YANG Wenqin3,4, JIANG Xingfen3,4, ZHOU Jianrong3,4, SUN Zhijia3,4, LI Jiang1,2()   

  1. 1. State Key Laboratory of High Performance Ceramics,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 201899,China
    2. Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China
    3. Spallation Neutron Source Science Center,Dongguan 523803,China
    4. Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China
  • Received:2025-06-23 Online:2025-12-20 Published:2026-01-04

摘要: Gd2O2S∶Tb闪烁陶瓷具有高的X射线阻止能力、高光输出、优异的光谱匹配性能、低生产成本等优势,是极具应用潜力的安检X射线计算机断层扫描用闪烁材料。本工作以Gd2O3粉体、Tb(NO33及H2SO4为原料,通过热水浴还原法合成了Gd2O2S∶Tb纳米粉体。采用热压烧结结合热等静压烧结(HIP)后处理制备了纯相Gd2O2S∶Tb陶瓷。系统探究了热压烧结温度(975~1 100 ℃)及HIP后处理温度(1 050~1 350 ℃)对Gd2O2S∶Tb陶瓷微观结构、光学透过率及闪烁性能的影响。随着热压烧结温度由975 ℃升高至1 100 ℃,热压后陶瓷内的气孔数量减少,相对密度由91.4%提升至98.9%。随着HIP温度从1 050 ℃升高至1 350 ℃,Gd2O2S∶Tb陶瓷的相对密度逐渐提高,更高的HIP处理温度促进了陶瓷内气孔的排出。因此,相较于1 050和1 200 ℃ HIP后处理温度,1 350 ℃ HIP后处理的Gd2O2S∶Tb陶瓷光学总透过率更高。经过热压烧结(1 050 ℃×1.5 h,60 MPa)结合HIP后处理(1 350 ℃×3 h,176 MPa Ar气氛)制备的Gd2O2S∶Tb陶瓷(厚度为1 mm)光学总透过率最高,为20.3%@545 nm,由于对闪烁光的有效提取,其也具有最高的X射线激发发光强度。

关键词: Gd2O2S∶Tb闪烁陶瓷; 热水浴法; 热压烧结; 热等静压烧结; 微结构

Abstract: Gd2O2S∶Tb scintillation ceramics have the advantages of high X-ray stopping power, high light output and excellent spectral matching performance and low production cost, making them promising scintillators for security X-ray computed tomography. The Gd2O2S∶Tb nano-powders were synthesized from Gd2O3 powders, Tb(NO33 and H2SO4 by the hot water-bath reduction method in this work. The pure-phase Gd2O2S∶Tb ceramics were fabricated by hot pressing and hot isostatic pressing (HIP) post-treatment. The effects of hot-pressing temperature (975~1 100 ℃) and HIP post-treatment temperature (1 050~1 350 ℃) on the microstructure, optical transmittance and scintillation properties of Gd2O2S∶Tb ceramics were systematically investigated. As the hot-pressing temperature increase from 975 ℃ to 1 100 ℃, the pores within the ceramics decrease and the relative densities increase from 91.4% to 98.9%. As the HIP temperature increase from 1 050 ℃ to 1 350 ℃, the relative density of Gd2O2S∶Tb ceramics gradually increase, with higher HIP temperatures promoting the removal of internal pores. Therefore, compared to HIP treatments at 1 050 and 1 200 ℃, the Gd2O2S∶Tb ceramics treated at 1 350 ℃ exhibit higher total optical transmittance. The Gd2O2S∶Tb ceramics hot pressed at 1 050 ℃ for 1.5 h under 60 MPa and HIP post-treated at 1 350 ℃ for 3 h under 176 MPa Ar atmosphere show the highest total optical transmittance of 20.3% at 545 nm (1 mm in thickness). It also shows the highest X-ray excited luminescence intensity due to the efficient extraction of scintillation light.

Key words: Gd2O2S∶Tb scintillation ceramics; hot water-bath method; hot pressing sintering; hot isostatic pressing sintering; microstructure

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