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The utilization of galvanic cells using Caβ″-Alumina solid electrolytes in a thermodynamic investigation of the CaO- AI2O3 system

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Abstract

Caβ″-alumina solid electrolytes have been used in calcium concentration electrochemical cells to determine the standard free energies of formation of the calcium aluminates, from their constituent oxides, in the temperature ranges specified: (1) CaO(s) + 6Al2O3(s) → CaO6Al203(s) ΔG° =-4270.9 - 9.4r(K)(±200)cal = -17869.4 - 39.3T (±840)J; 1100 to 1500 K. (2) CaO(s) + 2Al2O3(s) → CaO.2Al2O3(s) ΔG° = -3087.1 - 6.39HK) (±300)cal = -12916.4 -26.74T (±1260)J; 1100 to 1500 K. (3) CaO(s) + Al2O3(s)→ CaO-Al2O3(s) ΔG° = -3612.1 -4.35T(K) (±200)cal = -15113.0 - 18.2r(±840)J; 1050 to 1500 K. (4) 3CaO(s) + Al2O3(s) → 3CaO-Al2O3(s) ΔG° = -1868.7 - 7.05T(K)(±200)cal = -7818.6 - 29.57(±840)J; 1050 to 1320 K.

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Authors and Affiliations

  1. Department of Metallurgy and Materials Science, McMaster University, 1280 West Main Street, L8S 4L7, Hamilton, ON, Canada

    R. V. Kumar (Postdoctoral Research Fellow) & D. A. R. Kay (Professor)

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  1. R. V. Kumar
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  2. D. A. R. Kay
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Kumar, R.V., Kay, D.A.R. The utilization of galvanic cells using Caβ″-Alumina solid electrolytes in a thermodynamic investigation of the CaO- AI2O3 system. Metall Trans B 16, 107–112 (1985). https://doi.org/10.1007/BF02657495

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