Electrical Conductivity of Pure and Fe‐Doped Magnesium‐Aluminum Spinel
- 1 January 1980
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 63 (1-2) , 92-95
- https://doi.org/10.1111/j.1151-2916.1980.tb10656.x
Abstract
The electrical conductivity of nominally pure and Fe‐doped MgAl2O4 spinel was measured at 700 to 2000 K. The results for pure stoichiometric spinel can be fitted by exponential expressions with different activation‐energy parameters in three ranges of temperature. The conductivity of a sample containing 0.1% iron is the same as that of pure samples when the iron is in the Fe2+ form; it increases approximately a factor of two when the ion is in the Fe3+ form. The results are consistent with ionic conduction due to motion of cation vacancies.Keywords
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