Hybridization silicon carbides

The SRNL hybrid microwave concept design is shown in Figure 1. Metal tritide powder is slightly susceptible to conventional microwave frequency, so to obtain the high temperature needed a Silicon Carbide (SiC) susceptor is used to generate the hot temperature. This susceptor is used for all metal hydride materials regardless of the individual susceptibility of the sample. 

The basic element of the silicon carbide structure is the tetrahedron [17] due to sp hybridization of the atomic orbitals. This tetrahedron consists of a silicon or a carbon atom at the spatial center, surrounded by four atoms of the other kind. The SiC- bond is 88% covalent. The tetrahedra are arranged in such a way that units of three silicon and three carbon atoms form angled hexagons which are arranged in parallel layers as shown in Fig. 4. 

Heublein, B., Pethig, K., Ozbek, C., Elsayed, M., Bolz, A., Schaldach, M. Silicon carbide coating-a new hybrid design of coronary stents. Prog. Biomed. Res. 1, 33-39 (1998)... 

Other unusual additives include oxetanes, vinylic macromono-mers, silicon carbide, superconductive carbon blacks, silver-coated fly ash, metal oxides, Tb for green emission, antibacterial agents, and organic-inorganic hybrid copolymer fibers. In an interesting reversal, transition element acetylacetonate salts were decomposed in a PDMS matrix to give membranes with catalytic activity. ... 

The material has a lot of stmctural polytypes. The silicon carbide atoms are in state of sp3-hybridization and form a bond of a tetrahedron. In the crystal lattice of silicon carbide the short-range order is always the same but the long-range can differ that is why there are many polytypes of this material. The stmetural difference causes difference in physical and chemical properties (e.g., thermal resistance, electrical and optical characteristics). It makes one or another polytype being more preferred for different application. 

Silicon carbide, SiC, has a structure in which each Si atom is bonded to four C atoms, and each C atom is bonded to four Si atoms. Describe the bonding in terms of hybrid orbitals. 

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Zhou, X., Su, D., Wu, C., Liu, L., 2012. Tensile mechanical properties and strengthening mechanism of hybrid carbon nanotube and silicon carbide nanoparticle-reinforced magnesium alloy composites. Journal of Nanotechnology. Article ID 851862. 

K. Yang and M. Gu, "Enhanced thermal conductivity of epoxy nanocomposites filled with hybrid filler system of triethylenetetramine-functionalized multi-walled carbon nanotube/silane-modified nano-sized silicon carbide," Composites Part A, vol. 41, pp. 215-221,2010. 

Boucle, J., Kassiba, A., Makowska-Janusik, M., Herlin-Boime, N., Reynaud, C., Desert, A., Emery, J., Bulou, A., Sanetra, J., Pud, A. A., Kodjikian, S. (2006). Linear electro-optical behavior of hybrid nanocomposites based on silicon carbide nanocrystals and polymer matrixes. Physical Review B, 74, 205417-205411. 

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