Investigation of impact of calcination temperature on the structural, microstructural, and functional properties of MgO nanoparticles using Williamson Hall method
DOI:
https://doi.org/10.31349/RevMexFis.72.061006Keywords:
Magnesium oxide nanoparticles, calcination temperature, Williamson-Hall analysis, X-ray diffraction, crystallite size, lattice microstrain, defect evolution, nanocrystalline oxidesAbstract
Magnesium oxide (MgO) nanoparticles were synthesized using a co-precipitation method and then calcined at 450o C, 650o C, and 700o C to study the effects of different calcination temperatures on the structure and microstructure. The phase composition of the synthesized samples was studied using X-ray diffraction (XRD), which showed that all samples were composed of single-phase cubic MgO, and no secondary phases were detected. The Williamson-Hall (W–H) analysis using Lorentzian and Gaussian peak-profile functions was employed to investigate the effects of calcination temperature on the crystallite size and lattice microstrain. The results demonstrated that the calcination temperature significantly affected the MgO nanoparticles. With increasing temperature, the microstrain decreased, the crystallite size increased, and the thermal stability and ordering of the lattice improved. The study also revealed that increasing the calcination temperature led to a significant increase in the unit-cell volume and lattice ordering. When comparing the Lorentzian and Gaussian profiles, it was observed that both profiles produced very similar effects on the crystallite size; however, their effects on strain were different. Therefore, it was concluded that the calcination temperature used during the synthesis of MgO nanoparticles has a direct effect on the crystallite size, defect concentration, and the structural quality of the final product.
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