Abstract
This research aims to study the influence of the sintering temperature on the microstructural and physical properties for application as refractory bricks. Kaolin DD3 (from Djebel Debbagh, Guelma-Algeria) and spent magnesia-carbon refractory bricks mixtures (MgO-C) with relative weight ratios of 95/5 were synthesized by solid oxide reaction route at sintering temperatures of 1000, 1100, 1200, 1300, and 1400°C. The phases and their transformations during heating were investigated using X-ray diffraction analysis (XRD), scanning electronic microscopy (SEM), and helium pycnometer (AccuPyc II 1340). XRD results indicated the changes in the sintered pellets. The phase changes were mullite and α-low cristobalite at the sintering temperature of 1000°C. Cordierite begins to appear at 1100°C, and it increases as the sintering temperature rise, whereas the mullite and cristobalite phases decrease. At 1400°C, a magnesium aluminate spinel is formed with the presence of mullite, α-low cristobalite, and cordierite. SEM analysis was carried out to observe the surface morphology and the density decreased with rising sintering temperature.
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Mebrek, A. Sinterability properties of a ceramic synthesized from Algerian kaolin and spent magnesia-carbon refractory bricks. Int J Adv Manuf Technol 117, 823–834 (2021). https://doi.org/10.1007/s00170-021-07637-8
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DOI: https://doi.org/10.1007/s00170-021-07637-8