Strontium ruthenates: determination of Gibbs energies of formation using electrochemical cells

Jacob, Thomas K and Lwin, Kay Thi and Waseda, Yoshio (2003) Strontium ruthenates: determination of Gibbs energies of formation using electrochemical cells. In: Materials Science and Engineering B, 103 (2). pp. 152-161.

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Abstract

Metallic Ru has been found to coexist separately with SrO, $RuO_2$ and the interoxide phases, $Sr_2RuO_4$, $Sr_3Ru_2O_7$, $Sr_4Ru_3O_1_0$ and $SrRuO_3$, present along the pseudo-binary system $SrO – RuO_2$ at 1300 K. The standard Gibbs energies of formation $(\bigtriangleup_f_{(ox)}G^o)$ of the four strontium ruthenates have been measured in the temperature range from 925 to 1350 K using solid-state cells with yttria-stabilized zirconia as the electrolyte and $Ru+RuO_2$ as the reference electrode. The standard Gibbs energies of formation $(\bigtriangleup_f_{(ox)}G^o)$ of the ternary compounds from their component binary oxides SrO and $RuO_2$ can be represented by linear equations as a function of temperature:

Item Type:	Journal Article
Publication:	Materials Science and Engineering B
Publisher:	Elsevier
Keywords:	Phase diagram;Gibbs energy;Enthalpy;Entropy;Sr2RuO4, Sr3Ru2OImage, Sr4Ru3O10 and SrRuO3
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	02 Jun 2006
Last Modified:	19 Sep 2010 04:28
URI:	http://eprints.iisc.ac.in/id/eprint/7326

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