Thomas Jacob, K. ; Jayadevan, Kampurath P. ; Waseda, Yoshio (1998) Electrochemical determination of the Gibbs energy of formation of MgAl2O4 Journal of the American Ceramic Society, 81 (1). pp. 209-212. ISSN 0002-7820
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Official URL: http://www3.interscience.wiley.com/journal/1191006...
Related URL: http://dx.doi.org/10.1111/j.1151-2916.1998.tb02316.x
Abstract
The standard Gibbs energy of formation of the spinel MgAl2O4 from component oxides, MgO and α-Al2O3, has been determined in the temperature range 900 to 1250 K using a solid-state cell incorporating single-crystal CaF2 as the solid electrolyte. The cell can be represented as-Pt,O2,MgO+MgF2|CaF2|MgF2+MgAl2O4+α-Al2O3,O2,Pt-The standard Gibbs energy of formation from binary oxides, computed from the reversible emf, can be represented by the expression- ΔG°f,ox=-23600 - 5.91T(±150) J/mol-The 'second-law' enthalpy of formation of MgAl2O4 obtained in this study is in good agreement with high-temperature solution calorimetric studies reported in the literature.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Ceramic Society. |
| ID Code: | 12878 |
| Deposited On: | 11 Nov 2010 08:33 |
| Last Modified: | 03 Jun 2011 09:29 |
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