Synthesis and analysis of thermoluminescence glow curve of LiAlO2

Abstract

The synthesised LiAlO₂ by sol-gel with ethylene diamine tetraacetic acid (EDTA) method was investigated. The synthesised LiAlO₂ was studied for its structure and morphology by X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. The thermoluminescence glow curve of LiAlO₂ was analysed by deconvolution using the first-order, second-order, and general-order kinetic models. LiAlO₂ material exhibits a single-phase gamma structure when calcined at temperatures starting from 900^oC. The thermoluminescence glow curve of LiAlO₂ consists of two peaks at 136 and 248^oC, while peak 248^oC is considered a dosimetric peak. The γ-LiAlO₂ material was successfully synthesised using the sol-gel method combined with EDTA. The single-phase gamma LiAlO₂ material was obtained after being sintered at temperatures greater than 900^°C for 4 hours with lattice constants and density determined as follows: a=5.16870 Å, c=6.26790 Å, and δ=2.615 g/cm³. The thermoluminescence glow curve of LiAlO₂ was analysed using the glow curve deconvolution method, which showed the best fit with the general-order model, with a fitting  factor FOM=1.08×10^-2 and a kinetic order b=1.79.