Surface tension of liquid silicon

Experimental data on the surface tension of liquid silicon are analyzed. The effect of oxygen and other impurities is discussed. A large body of data is statistically processed. The expression σ = 0.82-0.3 × 10−3 (T − 1685) (J/m2) is recommended for the surface tension as a function of temperature in the range from 1685 to 1830 K.