Controlling the catalytic synthesis of SiC nanowires, carbon nanotubes, and graphene from a multilayer film precursor

High-Performance Electromagnetic Wave Absorbing CNT/SiCf Composites: Synthesis, Tuning, and Mechanism

“…Silicon carbide (SiC) is one of the candidate materials for EM wave absorption due to its tunable dielectric property combined with outstanding thermal and chemical stability, high tension strength, and low density. − It has been demonstrated that one-dimensional (1D) SiC materials such as fibers, nanowires, and whiskers exhibit better EM wave absorbing property than that of bulk SiC and SiC particles. − However, there is still a lot of room for improvement in the EM wave absorbing performance of these 1D SiC materials by barely modifying their dielectric properties besides the low permittivity, and much effort has been tried in this respect, including hybridization and doping. − Among the efforts, introducing carbon materials can effectively improve the EM wave absorbing ability for the optimized permittivity and permeability. − Compared with magnetic materials, carbon materials are more suitable for EM wave absorption for their low density, excellent stability, and high electrical conductivity. − Among carbon materials, carbon nanotubes (CNTs) stand out, in addition to those advantages mentioned above, for the high aspect ratio and superior mechanical property, which will bring about the significant reinforcement effect. − The common route to synthesize CNTs is by using the chemical vapor deposition (CVD) method, which needs a long heating process in the inert atmosphere containing carbon source gas and hydrogen. − Moreover, catalysts are needed and loaded on the matrix in advance. As the method is time-consuming and hydrogen has potential danger of explosion, its application on mass production is severely limited.…”

Preparation of cubic SiC from δ-Na2Si2O5/carbon nanocomposite using cobalt catalyst

“…Recently, SiC nanomaterials with different morphologies such as SiC nanowires [24][25][26][27][28][29][30][31][32][33][34], and mesoporous SiC hollow spheres [35] have been synthesized by several methods [24][25][26][27]. Most of the SiC growth methods apply the vapor-liquid-solid (VLS) mechanism, exploiting techniques like the chemical vapor deposition (CVD) and chemical vapor infiltration (CVI) [30][31][32][33].…”