Structure Characterization and Luminescence Studies of MgO:Li Calcinated at Different Temperatures via Solution Combustion and Sol-Gel Methods

Authors : Veysi GÜÇKAN, Volkan ALTUNAL, Adnan ÖZDEMİR, Zehra YEĞİNGİL

Pages : 45-48

View : 15 | Download : 7

Publication Date : 2019-12-26

Article Type : Research Paper

Abstract :In the present study, lithium insert ignore into journalissuearticles values(Li); doped magnesium oxide insert ignore into journalissuearticles values(MgO); samples were prepared using Solution Combustion Synthesis insert ignore into journalissuearticles values(SCS); and Sol-Gel insert ignore into journalissuearticles values(SG); methods. Their photoluminescence insert ignore into journalissuearticles values(PL); and thermoluminescence insert ignore into journalissuearticles values(TL); behaviors were determined after the different calcination temperatures. The aim of this study is to investigate the effect of different calcination temperatures on the PL and TL sensitivities of lithium doped MgO insert ignore into journalissuearticles values(MgO:Li); samples in pellet and powder forms prepared by SCS and SG methods. The structural characterization analysis of MgO:Li powder and pellets were carried out using X-ray diffraction insert ignore into journalissuearticles values(XRD); and scanning electron microscope insert ignore into journalissuearticles values(SEM); methods. The results of these structure analysis showed that MgO:Li samples have different crystal properties when changing calcination temperatures were applied during the preparation of the samples. Luminescence properties of the MgO samples which were synthesized at different calcination temperatures were investigated by the Photoluminescence insert ignore into journalissuearticles values(PL); and TL techniques. The maximum TL intensity of the samples was obtained at calcination temperature of 800 and 1000 oC for the SCS and SG methods, respectively. Uncontrolled chromium impurities were observed in MgO samples by using PL measurements. On the PL spectrum, peaks indicating chromium insert ignore into journalissuearticles values(III); insert ignore into journalissuearticles values(Cr3+); transmission in the red portion of the spectrum at 672, 698 and 721 nm are clearly evident. We investigated high dose sensitivity in these samples. This study presents optimum calcination temperatures in order to obtain maximum PL and TL sensitivity of MgO sample. It is also clear that it will contribute to the literature that it can be studied as a new dosimetric material.
Keywords : Thermoluminescence, Photoluminescence, MgO, Calcination