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Electrical Conductivity in the ZrO 2 ‐Rich Region of Several M 2 O 3 —ZrO 2 Systems
Author(s) -
STRICKLER D. W.,
CARLSON W. G.
Publication year - 1965
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.1151-2916.1965.tb14742.x
Subject(s) - solid solution , electrical resistivity and conductivity , analytical chemistry (journal) , materials science , conductivity , fluorite , mole fraction , mineralogy , cubic crystal system , crystallography , chemistry , metallurgy , physics , quantum mechanics , chromatography
The electrical conductivity of M 2 O 3 ‐ZrO 2 compositions containing 6 to 24 mole % M 2 O 3 , where M represents La, Sm, Y, Yb, or Sc, was examined. Only Sm 2 O 3 , Y 2 O 3 , and Yb 2 O 3 formed cubic solid solutions with ZrO 2 over most of this substitutional range. Scandia forms a wide cubic solid solution region with ZrO 2 at temperatures above 130°C whereas the cubic solid solution region at room temperature is narrow (6 to 8 mole % Sc 2 O 3 ). Lanthana additions to ZrO 2 produced no fluorite‐type cubic solid solutions within the compositional range investigated. Generally, the electrical conductivity of these cubic solid solutions increased as the size of the substituted cation decreased and the electrical conductivity for each binary system attained a maximum at about 10 to 12 mole % M 2 O 3 .