Electrochemical determination of the stability of mono‐ and dicalcium stannates

Jacob, K. T. ; Chan, J. C. (1974) Electrochemical determination of the stability of mono‐ and dicalcium stannates Journal of the Electrochemical Society, 121 (4). pp. 534-537. ISSN 0013-4651

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Official URL: http://jes.ecsdl.org/content/121/4/534.abstract

Related URL: http://dx.doi.org/10.1149/1.2401855


The thermodynamic properties of mono- and dicalcium stannates have been determined in the temperature range 973–‐1423°K from the electromotive force measurements on solid oxide galvanic cells Pt, Ni + NiO//CaO-ZrO2/Y203-ThO2//SnO2 + Sn, W, Pt Pt, Ni + NiO//CaO-ZrO2/Y20-ThO//CaSn03 + SnO2 + Sn, W, Pt Pt, Ni + NiO//CaO-ZrO2/Y203-ThO2//Ca2SnO4+CaSn03 + Sn, W, Pt and Pt, Ni + NiO//CaO-ZrO2/Y203-ThO//Ca2Sn04 + CaO, W, Pt The Gibbs free energy changes accompanying the formation of the stannates from component oxides may be represented by the equations 2CaO + Sn02→Ca2Sn04 ΔG=-17,040+0.85T (±300) cal CaO + SnOs→CaSnO3 ΔG=-17,390 + 2.0T (±300)cal The partial pressures of the tin bearing oxide species resulting from the decomposition of the stannates have been calculated as a function of the oxygen partial pressure by combining the results of this study with published information on the partial pressures and composition of oxide species over stannic oxide.

Item Type:Article
Source:Copyright of this article belongs to The Electrochemical Society.
Keywords:Calcium Compounds; Tin Compounds; Electrochemical Analysis; High-Temperature Effects; Thermochemistry; Free Energy; Dissociation; Thermodynamics; Solid Electrolyte; Galvanic Cell;Calcium Stannates;Vaporization
ID Code:94753
Deposited On:17 Oct 2012 11:25
Last Modified:19 May 2016 07:31

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