Eu 2+ ‐Doped Transparent Glass–Ceramics with Superior Scintillation Performance and Stability for High‐Resolution X‐Ray Imaging

ABSTRACT Glass scintillators, prized for their superior processability, structural flexibility, and cost‐effectiveness, hold significant promise for X‐ray imaging. However, their practical deployment is impeded by three critical challenges: severe radiation‐induced coloration under prolonged X‐ray exposure, intrinsically low scintillation efficiency, and inadequate thermal stability for high‐temperature operation. Herein, we propose a synergistic material design strategy that integrates Eu 2+ incorporation via C powder‐assisted reduction with in situ precipitation of Na 5 Lu 9 F 32 nanocrystals through controlled thermal treatment. The resultant transparent glass–ceramic (GC) achieves breakthrough metrics, including an X‐ray excited luminescence (XEL) integrated intensity reaching 220% of that of BGO, negligible transmittance loss after 50 Gy X ray irradiation, and exceptional anti‐thermal quenching behavior, retaining 119% of the room‐temperature XEL at 393 K. Its intrinsic chemical durability ensures environmental stability, while high spatial resolution of 23.8 lp/mm and reliable X‐ray imaging at elevated temperatures further highlight the practical applicability. These advances establish Eu 2+ doped Na 5 Lu 9 F 32 GCs as highly promising scintillators for extreme‐condition radiation detection.