Activities of oxygen in liquid Cu-Sb and Cu-Ge alloys |
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| Authors: | Shinya Otsuka Yoshihiro Matsumura Zensaku Kozuka |
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| Affiliation: | (1) Department of Metallurgical Engineering, Faculty of Engineering, Osaka University, Osaka, Japan;(2) Sumitomo Metal Industries, Ltd., Wakayama, Japan;(3) Department of Metallurgical Engineering, Faculty of Engineering, Osaka University, Osaka, Japan |
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| Abstract: | In order to determine the activity coefficients of oxygen, γΩ in liquid Cu-Sb and Cu-Ge alloys at 1373 K as a function of
alloy composition, the modified coulometric titrations, described previously, have been performed by using the galvanic cell:
O in liquid Cu-Sb or Cu-Ge alloys/ZrO2 (+CaO)/Air, Pt. A pronounced point of inflection in the In γΩvs alloy composition curve has been observed both for Cu-Sb and Cu-Ge alloys, as predicted by Jacob and Alcock’s quasichemical
equation. The measured data itself, however, are significantly different from those predicted by their equation. The validity
of Wagner’s solution model with one or two energy parameters has been also tested.
YOSHIHIRO MATSUMURA, formerly a Graduate Student, Osaka University. |
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