Structural and Luminescence Characterization of LiAlO2 Ceramics Synthesized by Sol Gel Technique

Abstract

This study aims to produce lithium aluminate (LiAlO2) materials as dense ceramics by the sol-gel method and to examine their structural and luminescence properties for radiation dosimetry applications. The crystal structures of ceramics synthesized using the XRD method were confirmed and their morphological properties were examined using SEM analysis. The defect concentrations and lattice parameters of LiAlO2 were also discussed in depth. It has been found that LiAlO2 ceramics have a total of three exponential decay function components that decay OSL signals fast, medium and slow. The TL glow curve of the material exhibited two TL peaks located around 110 and 200 °C. An intense luminescence band around 700 nm was found in RL and TL emissions, which is attributed to oxygen vacancies in the structure. Obtaining promising luminescence signals for passive dosimetry from LiAlO2 samples in this study may make them a candidate dosimeter for radiation dosimetry applications with further studies to be conducted in the future.