Electrical conductivity of the manganese chromite spinel solid solution

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Abstract

Spinel phase based on Mn 1+xCr 2-xO 4 (0≤x≤1) was synthesized and characterized. The lattice parameter of the spinel was found to increase with increasing Mn content up to x = 0.7. At x>0.7, the cubic spinel changed to tetragonal because of Jahn-Teller distortion. The electrical conductivity of the spinel also increased with increasing Mn content. Electrical conduction in this phase was likely through a small polaron hopping mechanism. The spinel phase showed similar electrical conductivity in both oxidizing and reducing environments expected in a solid oxide fuel cell operation.

Original languageEnglish
Pages (from-to)1050-1053
Number of pages4
JournalJournal of the American Ceramic Society
Volume88
Issue number4
DOIs
StatePublished - Apr 2005

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