β-SiC Nanoparticles Produced with Microwaves at 2.45 GHz and 5.8 GHz

Nanoparticles of SiC have been synthesized employing a sol-gel based method to prepare a precursor based on pheniltrimethoxysilane (PTMS), followed by microwave pyrolysis under N2 atmosphere, aimed to produce the cubic polytype 3C-SiC, known as β-SiC, separated of hexagonal or rhombohedral polytypes (α-SiC). Experiments at 2.45 GHz and 5.8 GHz were conducted at different conditions, multimode and single mode, and different susceptor configurations, confirming presence of β-SiC by means of FTIR, Transmission Electron Microscopy and electron diffraction.