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Electrical Conductivity of Pure and Fe‐Doped Magnesium‐Aluminum Spinel
Author(s) -
WEEKS R. A.,
SONDER E.
Publication year - 1980
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1980.tb10656.x
Subject(s) - spinel , activation energy , materials science , electrical resistivity and conductivity , aluminium , conductivity , stoichiometry , ionic conductivity , doping , thermal conduction , analytical chemistry (journal) , magnesium , ion , inorganic chemistry , mineralogy , metallurgy , chemistry , composite material , electrode , electrolyte , optoelectronics , organic chemistry , chromatography , electrical engineering , engineering
The electrical conductivity of nominally pure and Fe‐doped MgAl 2 O 4 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 Fe 2+ form; it increases approximately a factor of two when the ion is in the Fe 3+ form. The results are consistent with ionic conduction due to motion of cation vacancies.