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无机材料学报

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Eu离子掺杂GdxLu1.9-xO3闪烁陶瓷的制备、微结构与发光性能研究

陈宇洋1,2, 黄东1, 刘恒1, 李廷松1,2, 胡辰1,2, 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
  • 收稿日期:2026-07-26 修回日期:2026-09-08
  • 通讯作者: 李 江, 研究员. E-mail: lijiang@mail.sic.ac.cn; 胡 辰,副研究员. E-mail: huchen@mail.sic.ac.cn
  • 作者简介:陈宇洋(1999-), 男, 博士研究生. E-mail: chenyuyang21@mails.ucas.ac.cn
  • 基金资助:
    国家自然科学基金(52502156)

Preparation, Microstructure, and Luminescence Properties of Eu-doped GdxLu1.9-xO3 Scintillation Ceramics

CHEN Yuyang1,2, HUANG Dong1,2, LIU Heng1, LI Tingsong1,2, HU Chen1,2, 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
  • Received:2026-07-26 Revised:2026-09-08
  • About author:CHEN Yuyang (1999-), male, PhD candidate. E-mail: chenyuyang21@mails.ucas.ac.cn
  • Supported by:
    National Natural Science Foundation of China (52502156)

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摘要： Eu:(Gd,Lu)2O3陶瓷具有高密度、高有效原子序数,高光产额的特点,能很好满足高能射线成像的应用要求。为了探究Gd3+含量对陶瓷微观结构和光学性能的影响,本研究采用共沉淀法合成了不同Gd3+含量(x=0、0.3、0.6、0.9、1.2)的5%Eu:GdxLu1.9-xO3(5%为原子百分数)纳米粉体,所有粉体均呈纯立方相,晶格常数随Gd3+含量增大而增大(1.0391→1.0709 nm)。经1625 ℃真空预烧4 h结合热等静压烧结后处理(1700 ℃×3h, 200 MPa Ar)所有陶瓷的相对密度均达99%以上。5%Eu:GdxLu1.9-xO3陶瓷的直线透过率随Gd3+含量先升后降,x=0.6的样品(厚度1.5 mm)在800 nm和611 nm处透过率分别达75.8%和73.2%。5%Eu:GdxLu1.9-xO3陶瓷的光致发光(PL)和X射线激发发光(XEL)强度,随着Gd3+含量的增加先增后减,荧光寿命从1.26 ms缩短至0.90 ms,归因于Eu3+向低对称性C2格位迁移。x=0.6的5%Eu:Gd0.6Lu1.3O3陶瓷PL和XEL强度最高。抗辐照性能方面,x=0.6样品经X射线持续辐照20 min后XEL强度下降约5%,而纯Lu基陶瓷(5%Eu:Lu1.9O3)下降约22%,表明适量Gd3+引入可显著提升材料辐照稳定性。所有组分陶瓷在可见光和X射线激发下都呈现强烈的红光发射(5D0→7F2, 612 nm),与硅光电二极管光谱响应有着良好的耦合性。

关键词: 透明陶瓷, 闪烁陶瓷, 微结构, 发光性能

Abstract: Eu:(Gd,Lu)2O3 ceramics possess high density, high effective atomic number, and high light yield, making them well-suited for high-energy ray imaging applications. To investigate the effect of Gd3+ doping concentration on the microstructure and optical properties of the ceramics, 5%Eu:GdxLu1.9-xO3 (5% is in atomic percent) nano-powders with different Gd3+ contents (x=0, 0.3, 0.6, 0.9, 1.2) were synthesized via co-precipitation. All powders exhibited a pure cubic phase, with the lattice constant increasing from 1.0391 nm to 1.0709 nm as the Gd3+ doping concentration increased. After vacuum pre-sintering at 1625 ℃ for 4 h followed by hot isostatic pressing (HIP) at 1700 ℃ for 3 h under 200 MPa Ar atmosphere, the relative densities of all ceramics exceeded 99%. The optical transmittance of 5%Eu:GdxLu1.9-xO3 ceramics first increased and then decreased with increasing Gd3+ content; the sample with x=0.6 achieved transmittances of 75.8% at 800 nm and 73.2% at 611 nm. The photoluminescence (PL) and X-ray excited luminescence (XEL) intensities of the 5%Eu:GdxLu1.9-xO3 ceramics first increased and then decreased with increasing Gd3+ content, while the fluorescence lifetime decreased from 1.26  ms to 0.90  ms, attributed to the migration of Eu3+ to low-symmetry C₂ sites. The sample with x=0.6 exhibited the highest PL and XEL intensities. In terms of radiation resistance, the XEL intensity of the x=0.6 sample decreased by approximately 5% after continuous X-ray irradiation for 20 min, while that of the Lu-based ceramic (5%Eu:Lu1.9-xO3 decreased by about 22%, indicating that the introduction of an appropriate amount of Gd3+ can significantly enhance the radiation stability of the material. All the ceramics with different compositions exhibit intense red emission (5D0→7F2, 612 nm) under both visible-light and X-ray excitation, which matches well with the spectral response of silicon photodiodes.

Key words: transparent ceramics, scintillation ceramics, microstructure, luminescence properties

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