Synthesis of Nanocrystalline SiC via Sol–Gel Method: Effect of Low-Temperature Heat Treatment on Phase Formation and Nanostructures

zalnezhad, zahra; sasani ghamsari, morteza; Haratizadeh, hamid

doi:10.22068/ijmse.4346

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‎ 10.22068/ijmse.4346

Synthesis of Nanocrystalline SiC via Sol–Gel Method: Effect of Low-Temperature Heat Treatment on Phase Formation and Nanostructures

Zahra Zalnezhad

, Morteza Sasani ghamsari

, Hamid Haratizadeh

Abstract: (322 Views)

Silicon carbide (SiC) is one of the most important silicon-based compounds, owing to its favorable physical, chemical, and biological properties, and is widely employed in various fields such as electronics, chemical industries, and quantum computing. Several methods have been reported for synthesizing SiC nanoparticles, including chemical vapor deposition (CVD), hydrothermal synthesis, carbothermal reduction, and sol–gel processing. Among these, the sol–gel method has attracted significant attention due to its high yield, process controllability, biocompatibility, accessibility of precursors, and ability to produce nanoparticles. In this study, SiC nanosized powders were synthesized through the sol–gel route combined with carbothermal reduction, using tetraethyl orthosilicate (C₂H₅)₄SiO₄) and sucrose (C₁₁H₂₂O₁₁) as the silicon and carbon sources, respectively. The silica/sucrose composite was subjected to carbothermal reduction under an argon atmosphere at a pressure of 10 mTorr in a vacuum furnace at 1350°C for 3 h. The structural properties of the synthesized SiC nanopowders were analyzed using X-ray diffraction (XRD), while their optical characteristics were investigated through FTIR, diffuse reflectance spectroscopy (DRS), and photoluminescence (PL). This work demonstrates a greener, lower-temperature route to phase-controlled SiC nanoparticles with optically active vacancy centers.

Keywords: Silicon carbide nanoparticles, Sol–Gel, Carbothermal reduction

Full-Text [PDF 820 kb] (108 Downloads)

Type of Study: Research Paper | Subject: Characterization of Physical and Thermal Properties of Materials