Mechanism of thermal decomposition of silanes

摘要

Data on the mechanism of thermal decomposition of silanes are generalised. The main stages of the process are distinguished and characterised. Attention is concentrated on the elementary homogeneous reactions, deposition of silicon fromthe gas phase and formation of aerosols. Various models of formation of aerosols are considered. The results of theoretical and experimental investigations of this process are discussed. Data on the chemical composition of the solid product of silane pyrolysis (wall deposit and aerosol particles) are presented. It is noted that the hydrogencontent inthe solid product varies over wide limits.