Kinetics of evaporation under vacuum in preparation of solar-grade silicon by electron beam melting

Silicothermic synthesis of phase‐pure HfB2 fine powder

“…Generally, evaporation loss of silicon may occur under vacuum at a high temperature and is positively interrelated with temperature 33,34 . In the present work, the silicothermic reductions were performed at 900°C-1200°C under Ar atmosphere, the equilibrium vapor pressure of silicon would be extremely low (10 −11 -10 −7 kPa), according to the following relationship (6).…”