溶融銅の表面張力におよぼす酸素の影響

抄録

The effect of dissolved oxygen on the surface tension of liquid copper has been measured by the sessile drop method at 1115°, 1230° and 1300°C. Oxygen is highly surface-active in liquid copper, and for a oxygen content of 0.2%, the surface-tension is lowered by 450 dyn·cm⁻¹ at 1150° 420 dyn·cm⁻¹ at 1230° and 380 dyn·cm⁻¹ at 1300°C. The degree of adsorption of oxygen on the liquid copper surface has been calculated, and the result indicates the maximum surface excess of oxygen to be about 1.0×10⁻⁹ mol·cm⁻², which corresponds to a mono-molecular layer of Cu₂O or O⁻⁻.