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Effect of Microstructures on the Ionic Conductivity of Ceria‐Calcia Oxides
Author(s) -
Eguchi Koichi,
Kunishaki Toshiya,
Arai Hiromichi
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.tb07377.x
Subject(s) - ionic conductivity , solid solution , materials science , microstructure , phase (matter) , homogeneous , solubility , conductivity , chemical engineering , ionic bonding , mineralogy , inorganic chemistry , chemistry , ion , metallurgy , thermodynamics , electrolyte , physics , organic chemistry , electrode , engineering
Ceria‐calcia, (CeO 2 ) 1‐x (CaO) x , at x<0.23 consisted of a homogeneous solid solution; however, the calcia phase precipitated at × >0.23. The ionic conductivity and transference number of oxygen for CeO 2‐ CaO solid solution were high at low temperature and were maintained even when calcia was added in amounts exceeding the solubility limit. Crystals of precipitated CaO exist as small granules which are dispersed in the continuous matrix of CeO 2 ‐CaO solid solution.