Electrical Conductivity of Pure and Fe-Doped Magnesium-Aluminum Spinel

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 contai...

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Veröffentlicht in:	J. Am. Ceram. Soc.; (United States) 1980-01, Vol.63 (1-2), p.92-95
Hauptverfasser:	WEEKS, R. A., SONDER, E.
Format:	Artikel
Sprache:	eng
Schlagworte:	360204 - Ceramics, Cermets, & Refractories- Physical Properties ALKALINE EARTH METAL COMPOUNDS ALLOYS ALUMINIUM COMPOUNDS ALUMINIUM OXIDES CATIONS CHALCOGENIDES CHARGED PARTICLES CRYSTAL DEFECTS CRYSTAL STRUCTURE ELECTRIC CONDUCTIVITY ELECTRICAL PROPERTIES IONIC CONDUCTIVITY IONS IRON ADDITIONS IRON ALLOYS MAGNESIUM COMPOUNDS MAGNESIUM OXIDES MANGANESE ADDITIONS MANGANESE ALLOYS MATERIALS SCIENCE MINERALS OXIDES OXYGEN COMPOUNDS PHYSICAL PROPERTIES POINT DEFECTS SILICON ADDITIONS SILICON ALLOYS SPINELS TEMPERATURE DEPENDENCE VACANCIES VANADIUM ADDITIONS VANADIUM ALLOYS
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Beschreibung
Zusammenfassung:	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.
ISSN:	0002-7820 1551-2916
DOI:	10.1111/j.1151-2916.1980.tb10656.x