Study on volatilization rate of silicon in multicrystalline silicon preparation from metallurgical grade silicon

► The experimental measurement of silicon volatilization rate was carried out. ► The experimental values were obtained at different evaporation time and temperatures. ► Silicon volatilization is comprised of formation and maintaining vapor-liquid equilibrium. ► The equation for calculating the volatilization rates of silicon revised as ω = (2.23∼6.30)×10−1ppa(M/T)1/2.