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Vol.10, No.2, 114 ~ 121, 1972
Title
A Chemical Equilibrium between Liquid Silicon and Silicon Monoxide
박용진Yong Jin Park, 조정완Chung Wan Cho
Abstract
The liquid silicon was oxidized to silicon monoxide by 10-65% CO₂ gas in CO·CO₂gas mixture under a total pressure of about 1 atmosphere at temperatures ranging from 1,450℃ to 1,650℃. The reaction equation was estimated as follows: Si(ℓ)+CO₂=SiO(g)+CO ΔF_α^0=30,840-31.67T The standard free energy change, ΔF_α^0 for the above reaction between the experimental results and calculated data from ΔH^0_(298), ΔS^0_(298) and heat capacity of each component was closely agreed with each other. White and amorphous silicon monoxide powder was obtained by condensation at 900-600℃, but 0.5-1.5% carbon was deposited on silicon monoxide powder by the Boudouard`s reaction, 2CO=CO₂+C, below 600℃.
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