Synthesis of silicon carbide from secondary silicon-containing materials
Makhambetov Y. Burumbayev A. Kelamanov B. Kabylkanov S. Yucel O. Zhakan A. Sadyk Z. Mukanov S.
2025SciCell s.r.o.
Acta Metallurgica Slovaca
2025#31Issue 4219 - 224 pp.
This study presents an experimental approach to the synthesis of silicon carbide (SiC) using technogenic and biogenic wastes—microsilica and rice husk. The synthesis was carried out by carbothermal reduction in a self-designed and constructed laboratory resistance furnace. The starting materials were subjected to preliminary mechanical activation in a planetary centrifugal mill, which enhanced their reactivity. The morphology and elemental composition of the samples were examined using scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). The results demonstrated the formation of characteristic SiC crystals and confirmed their composition, close to stoichiometric. X-ray diffraction analysis revealed the presence of β-SiC (3C) and hexagonal polytypes (4H, 6H-SiC), as well as secondary phases of silicon dioxide (cristobalite, tridymite), reflecting the specific features of the reaction at high temperatures. It was established that mechanical activation promotes more intensive SiC formation and reduces the amount of residual oxide phases. The obtained results confirm the potential of utilising secondary silicon-containing resources for SiC synthesis, which is significant for the development of environmentally oriented technologies and for expanding the raw material base for high-value-added materials.
mechanical activation , microsilicon , petroleum coke , pyrolysis , rice husk , silicon carbide , synthesis , waste
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Chemical-Metallurgical Institute named after Zh. Abishev, Karaganda, Kazakhstan
Karaganda Industrial University, Temirtau, Kazakhstan
Aktobe Regional University named after K. Zhubanov, Aktobe, Kazakhstan
Istanbul Technical University, Istanbul, Turkey
Chemical-Metallurgical Institute named after Zh. Abishev, Yermekov street 63, Karaganda, 100003, Kazakhstan
Chemical-Metallurgical Institute named after Zh. Abishev
Karaganda Industrial University
Aktobe Regional University named after K. Zhubanov
Istanbul Technical University
Chemical-Metallurgical Institute named after Zh. Abishev
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