The Stability of SiO Solid and Gas

Oxidation Pattern of Small Silicon Oxide Clusters: Structures and Stability of Si6On (n = 1−12)

“…For Si 6 10 The abundance SiO species in fragmentation of silicon oxide clusters is in consistent with the experimental results. 16,17 For Si 6 O 12 , the easiest fragmentation pathway is Si 6 O 12 f SiO 2 + Si 5 O 10 , producing a SiO 2 molecule. It is clear from the calculated results of fragmentation energies ( Figure 6) that Si 6 O 6-7 and Si 6 O possess the smallest fragmentation energy, and thus can dissociate easily from thermodynamic viewpoint.…”

Float-reaction between liquid bronze and magnesium aluminosilicate and ZnO-doped magnesium aluminosilicate glass–ceramic-forming glassmelts

“…One estimates, thus, if k 0 ¼D (a typical, albeit generally incorrect, application of parabolic kinetics), then the reaction depth would be $10 À4 m. That the reaction depth realized is ten times greater than this value means that D r G/ RT % 10 (assuming a = 1), or the anticipated driving potential for the float-reaction overall is D r G $ 130 kJ mol À1 . This value is entirely reasonable for a redox reaction -even one as complex as the float-reaction: it represents, for example, the D r G°for the oxidation of Si 2+ to Si 4+ [32] and of Cu 0 to Cu 2+ [8] at 1300°C.…”

“…What some may find surprising in the dynamics here, however, is the apparent high mobility of ionic silicon in the glassmelt suggested by the reaction concentration profiles: silicon is clearly diffusing, and with a transport coefficient exceeding that of network-modifier Ca 2+ and Mg 2+ , and yet, as a network-former, Si 4+ is considered one of the least mobile species in silicate melts and glasses, e.g., [31]. Silicon, however, like the other Group 14 metalloids, forms a divalent compound with oxygen, e.g., [32,33]. Further, X-ray photoelectron spectroscopy (XPS) studies of the oxidation of elemental silicon demonstrate the importance of mobile Si 2+ in the diffusion-effected kinetics, e.g., [34].…”

Gas-phase formation of SiSe in IR laser-co-decomposition of dimethyl selenide and 1,3-disilacyclobutane

“…SiSe is isovalent to SiO, the well-known gaseous species [28,29] undergoing fast polymerization to structurally inhomogeneous material (e.g. [30][31][32]).…”