Kale, GM and Jacob, KT (1989) Thermodynamic Stability of Potassium-beta-Alumina. In: Metallurgical and Materials Transactions B, Process Metallurgy and Materials Processing Science, 20 (5). pp. 687-691.
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The activity of K sub 2 O in a mixture of alpha -alumina and potassium beta -alumina has been determined using a solid state galvanic cell in the temperature range 600-1000K. The cell is written such that the right hand electrode is positive. The solid electrolyte consisted of a dispersion of alpha -alumina ( approx 15 vol.%) in a matrix of K beta -alumina. The emf of the cell was found to be reversible and to vary linearly with temperature. From the emf and auxiliary data on In sub 2 O sub 3 and K sub 2 O from the literature, the activity of K sub 2 O in the two-phase mixture is obtained. The standard free energy of formation of K beta -alumina from component oxides is given. Graphs.
| Item Type: | Journal Article |
|---|---|
| Publication: | Metallurgical and Materials Transactions B, Process Metallurgy and Materials Processing Science |
| Publisher: | Minerals Metals Materials Soc |
| Additional Information: | Copyright of this article belongs to Minerals Metals Materials Soc. |
| Department/Centre: | Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) |
| Date Deposited: | 20 Oct 2010 05:34 |
| Last Modified: | 20 Oct 2010 05:34 |
| URI: | http://eprints.iisc.ac.in/id/eprint/33311 |
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