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Electrical Conductivity in Fe 1‐x O‐MgO Solid Solutions
Author(s) -
HANSEN KENT W.,
CUTLER IVAN B.
Publication year - 1966
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.1151-2916.1966.tb13217.x
Subject(s) - electrical resistivity and conductivity , solid solution , conductivity , activation energy , ohmic contact , oxide , thermal conduction , materials science , analytical chemistry (journal) , magnesium , crystallite , semiconductor , inorganic chemistry , chemistry , electrode , metallurgy , composite material , optoelectronics , electrical engineering , chromatography , engineering
Solid solutions of magnesium oxide containing iron oxide in concentrations varying from a few percent to 100% were fabricated in polycrystalline form for studying the mechanism of electrical conduction. These semiconductors were ohmic in the range 0 to 10 v/cm, conducted by hole transfer, and showed reproducible conductivity data from room temperature to about 300°C. The conductivity of these solid solutions increases with increasing Fe 3+ concentration. The electrical conductivity is also dependent on the total iron oxide content, decreasing rapidly (nonlinear dependence) as Fe 1‐ x O is diluted with MgO. The activation energy for electrical conduction varies from 0.1 to about 0.5 ev for the dilute solid solutions (less than about 15 cation % iron).