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Thermodynamic properties and phase boundaries of Co O solutions

Jacob, KT and Hajra, JP (1985) Thermodynamic properties and phase boundaries of Co O solutions. In: Zeitschrift für Metallkunde, 76 (10). pp. 709-713.

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The thermodynamic properties of liquid unsaturated Co--O solutions have been determined by electrochemical measurements using (Y sub 2 O sub 3 )ThO sub 2 as solid electrolyte. The cell can be represented as, Pt. MoO sub 2 + Mo | (Y sub 2 O sub 3 )ThO sub 2 | O sub Co , tungsten, Pt, Emf of the cell was measured as a function of oxygen concentration in liquid Co at 1798, 1873 and 1973K. Least-mean squares regression analysis of the experimental data gives for the free energy of solution of diatomic oxygen in liquid Co Delta G exp 0 sub O(Co) = --84935--7.61 T ( plus/minus 400) J/g-atom and self interaction parameter for oxygen epsilon exp O sub O = --97240/T + 40.52 ( plus/minus 1) where the standard state for O is an infinitely dilute solution in which the activity is equal to atomic percent. The present data are discussed in comparison with those reported in the literature and the phase diagram for the Co--O system. 18 ref.--AA.

Item Type: Journal Article
Publication: Zeitschrift für Metallkunde
Publisher: Carl Hanser Verlag
Additional Information: Copyright of this article belongs to Carl Hanser Verlag.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 07 Dec 2011 09:16
Last Modified: 07 Dec 2011 09:16
URI: http://eprints.iisc.ac.in/id/eprint/42571

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