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KTbGdF Nano-Glass Composite Scintillator with Excellent Thermal Stability and Record X-Ray Imaging Resolution

Laser and Photonics Reviews, ISSN: 1863-8899
2025
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Article Description

Scintillators exhibiting both excellent spatial resolution and thermal stability are highly sought after. Herein, by employing a suite of techniques—including phase-separation-assisted crystallization, energy transfer, and compensation—Tb-doped nano-glass composite (nano-GC) scintillators are developed with good scintillation performance. The Tb-doped nano-GC scintillator exhibits an unprecedented enhancement in the integrated intensity of X-ray excited luminescence (XEL) by more than five times, as compared with BiGeO (BGO) crystal. It achieves an estimated light yield of 54 900 photons MeV and a sensitivity of 635.31 nGy s. An X-ray imaging system based on the Tb-doped nano-GC scintillator delivers a record resolution of 28.7 lp mm at room temperature and 28.1 lp mm even at 500 °C, thanks to the excellent thermal stability, namely, the scintillator preserves the original XEL intensity up to 300 °C, and ≈73% at 500 °C. The heat resistance excels currently available high-temperature scintillation materials. These attributes, combined with robust moisture resistance, position the developed nano-GC scintillator an exceptionally promising candidate for high-temperature X-ray imaging used in harsh environments.

Bibliographic Details

Sikai Wang; Jingdao Yang; Chuang Liu; Wenhao Li; Xiaoxin Zheng; Jing Ren; Jianzhong Zhang; Xusheng Qiao; Xinyuan Sun; Sen Qian; Jifeng Han; Junxiao Wu; Xuhui Xu

Wiley

Materials Science; Physics and Astronomy

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