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Immiscibility in the CoO‐NiO System
Author(s) -
Bergman Bill,
Agren John
Publication year - 1986
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.1151-2916.1986.tb07352.x
Subject(s) - non blocking i/o , spinodal decomposition , thermodynamics , materials science , solid solution , chemistry , physics , metallurgy , phase (matter) , biochemistry , organic chemistry , catalysis
The thermodynamic properties of the solid CoO‐NiO solution have been assessed in terms of a thermodynamic model including a contribution from the magnetic transition. The parameters in the model have been adjusted to fit emf measurements in the literature. The miscibility gap at low temperatures is calculated and compared to the gap proposed by Kinoshita, Kingery, and Bowen from their TEM studies. A very severe discrepancy between experimental maximum temperature (760°C) and the calculated one (185°C) is found. Various reasons for the descrepancy are discussed.