28th Congress of SCTM

Influence of samarium(III) oxide content on the physicochemical and thermal properties of metakaolin-based geopolymers

Not scheduled

20m

Metropol Lake Resort

E-poster Inorganic chemistry and technology, inorganic materials and metallurgy

Speaker

Dr Sanja Knežević (Department of Materials, Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, Mike Petrović Alasa 12-14, Vinča, Belgrade, Serbia)

Description

Aluminosilicate materials are widely recognized for their high mechanical strength, corrosion resistance, and thermal stability.1 In this study, metakaolin-based geopolymers were synthesized by alkali activation and doped with samarium(III) oxide (Sm2O3) in order to investigate its influence on their physicochemical and thermal properties. Two samples containing 1 wt% and 5 wt% Sm2O3 were prepared and denoted as S1 and S2, respectively. The synthesized materials were characterized using energy-dispersive X-ray fluorescence spectrometry (EDXRF)2,3, diffuse reflectance infrared Fourier transform spectroscopy (DRIFT), X-ray diffraction analysis (XRD)4, and photothermal beam deflection (PBD). The obtained results indicate that Sm2O3 was successfully incorporated into the aluminosilicate matrix, without causing significant changes in the density or porosity of the geopolymers. However, the addition of Sm2O3 altered the material's thermal response, thereby enhancing thermal conductivity. These findings suggest that Sm2O3-doped metakaolin-based geopolymers may be considered promising candidates for applications requiring improved thermal stability and thermal management, including potential use as functional insulating materials.