High‐Brightness Delayed Imaging Realized by Embedding Zinc Gallate Nanocrystals Into Glass

ABSTRACT X‐ray delayed imaging technology leverages an “irradiation‐storage‐thermally stimulated readout” mode, demonstrating unique advantages in intermittent monitoring scenarios such as high‐temperature/high‐radiation environments. This typically requires materials combining abundant carrier‐trapping energy levels with structural thermostability. Herein, Cr 3+ ‐doped ZnGa 2 O 4 glass ceramics (ZGC GCs) serve as a functional platform, utilizing their deep trap energy levels (main peak 197.7°C) to efficiently capture and store X‐ray imaging information, and achieve high‐brightness X‐ray delayed imaging by modulating the thermally stimulated detrapping rates. Under its exceptional structural thermostability and deep trap characteristics, ZGC GCs maintain high‐quality delayed imaging capability by thermal stimulation even after 180°C irradiation, highlighting their potential for high‐temperature nondestructive testing and surpassing the high‐temperature failure threshold of conventional scintillators. This work pioneers functional applications of glass ceramics in high‐temperature irradiation scenarios and offers a novel perspective for selecting harsh‐environment‐adapted X‐ray imaging materials.