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Thermodynamic Properties of YbRhO3 and Phase Relations in the System Yb-Rh-O

Jacob, KT and Gupta, Preeti and Han, Donglin and Uda, Tetsuya (2016) Thermodynamic Properties of YbRhO3 and Phase Relations in the System Yb-Rh-O. In: JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION, 37 (4, SI). pp. 503-509.

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Official URL: http://dx.doi.org/10.1007/s11669-016-0482-y

Abstract

Thermodynamic properties of the ternary oxide YbRhO3 were determined by using a solid-state electrochemical cell incorporating calcia-stabilized zirconia as the solid electrolyte in the temperature range from 900 to 1300 K. The standard Gibbs energy of formation of YbRhO3 from component binary oxides Yb2O3 with C-rare earth type structure and Rh2O3 with orthorhombic structure can be represented by the equation,Standard enthalpy of formation of YbRhO3 from elements in their normal standard states is -1153.18(+/- 3) kJ/mol and its standard entropy is 100.93(+/- 0.6) J/K/mol at 298.15 K. The decomposition temperature of YbRhO3 is 1671(+/- 3) K in pure oxygen, 1566(+/- 3) K in air and 1047(+/- 3) K at an oxygen partial pressure of , where P-o = 0.1 MPa is the standard pressure. Decomposition temperature was confirmed by DTA/TGA. Phase diagrams for the system Yb-Rh-O are computed using the thermodynamic data.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 22 Oct 2016 09:26
Last Modified: 22 Oct 2016 09:26
URI: http://eprints.iisc.ac.in/id/eprint/55029

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