Abstract
The effect of arsenic and selenium on the activity coefficient of oxygen in liquid copper at 1150° C was determined by electrochemical methods using oxygen concentration cells. Arsenic increases the activity coefficient of oxygen and selenium decreases it, the first-order interaction parameters being ϵ As 0 = + 4.0 (±0.5), and ϵ Se 0 = −14.0 (±0.5). Temperature dependencies of the parameters were estimated by using earlier assessments in dilute copper-oxygen alloys.
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