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Ionic Conductivity of Cubic Solid Solutions in the System CaO—Y 2 O 3 —ZrO 2
Author(s) -
STRICKLER D. W.,
CARLSON W. G.
Publication year - 1964
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.1151-2916.1964.tb14368.x
Subject(s) - ionic conductivity , solid solution , conductivity , monoclinic crystal system , ternary operation , ionic bonding , analytical chemistry (journal) , materials science , fast ion conductor , oxygen , phase (matter) , phase diagram , ternary numeral system , crystallography , ion , mineralogy , chemistry , crystal structure , electrolyte , metallurgy , chromatography , organic chemistry , electrode , computer science , programming language
The ionic conductivity of cubic solid solutions in the system CaO ‐Y 2 O 3 ‐ZrO 2 was examined. Particular Y 2 O 3 ‐ZrO 2 binary compositions were more conductive at elevated temperatures (>600°C) than either CaO‐ZrO 2 binary or CaO‐Y 2 O 3 ‐ZrO 2 ternary compositions. The higher ionic conductivity appears to be related to a lower activation energy rather than to the number of oxygen vacancies dictated by composition. Those compositions of highest conductivity lie close to the cubic‐monoclinic solid‐solution phase boundary. Conductivity‐temperature data are presented that indicate a reversible order‐disorder transition for Y 2 O 3 ‐ZrO 2 cubic solid solutions containing 20 and 25 mole % Y 2 O 3 . The transference number for the oxygen ion at 1000°C for Y 2 O 2 ‐ZrO 2 cubic solid solutions is greater than 0.99.