Repetitive Self-ignition in Mixtures of Silane with Oxygen in Closed Vessels

Self-propagating high-temperature synthesis of nanomaterials

“…Self-propagating high-temperature synthesis of particles and films of Si, Ge, SiO 2 , GeO 2 , Si 3 N 4 by means of oxidation and pyrolysis of silane or germane 11,35,36 as well as gas-phase synthesis of ultradispersed amorphous powders of SiC, Si 3 N 4 , SiN x C y and of crystalline BN in the combustion mode 37 have been reported. The main advantage of this method for the production of insulating, protective and semiconductive films or nanosized powders is the possibility of performing the synthesis at relatively low temper-atures and pressures, which allows one to avoid high charge densities on surfaces of the films, which greatly enhances the quality of the semiconducting products.…”

Quantitative Description of the Rarefied Flame of a Hydrogen-Oxygen Mixture with Inclusion of the Heterogeneous Interaction of Chains

“…However, these explanations were not unambiguous and the observed kinetic phenomena later generally turned out to have other causes (the effect of the lubricant, self-heating, and various inhomogeneities within the reactor [2,14]). For example, the combustion of silane, whose product ( SiO 2 ) deposited on the reactor wall and caused an enhanced glow of the surface, was regarded in [13] as a process involving heterogeneous chain branching. However, Azatyan and Aivazyan in 1986 [13] were likely to only reproduce, under new conditions, the phenomenon observed by Alyea, Haber, and Nalbandyan in 1930, and the enhanced glow of pure quartz formed in silane combustion is probably related not to heterogeneous branching but to rapid heterogeneous chain initiation on fresh quartz [8].…”

“…These active sites were a product of heterogeneous chain initiation rather than heterogeneous branching as assumed by Alyea and Haber [8]. Over more than half a century , a number of attempts were made to experimentally detect the accelerating effect of the wall on the hydrogen combustion in the gas and to relate the obtained results to the concept of heterogeneous chain branching [6][7][8]13]. However, these explanations were not unambiguous and the observed kinetic phenomena later generally turned out to have other causes (the effect of the lubricant, self-heating, and various inhomogeneities within the reactor [2,14]).…”