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Electrical Conductivity of Zirconia Stabilized with Scandia and Yttria
Author(s) -
Kaneko Hiroyuki,
Jin Fuxue,
Taimatsu Hitoshi,
Kusakabe Hirotatsu
Publication year - 1993
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.1151-2916.1993.tb03682.x
Subject(s) - activation energy , yttria stabilized zirconia , electrical resistivity and conductivity , cubic zirconia , materials science , atmospheric temperature range , electrolyte , conductivity , analytical chemistry (journal) , mineralogy , chemistry , thermodynamics , composite material , ceramic , electrode , electrical engineering , physics , chromatography , engineering
Electrical conductivity of zirconia stabilized with scandia and yttria (Sc 2 O 3 +Y 2 O 3 = 8 mol%) has been measured by the complex impedance method in the temperature range 573 to 1173 K. With increasing Sc 2 O 3 concentration, electrical conductivity increases at temperatures above 640 K, but it decreases below this temperature. Electrical conductivity in the electrolytes examined is a result of two processes: an activation energy of 59 to 79 kJ·mol −1 predominant at high temperatures and an activation energy of 109 to 125 kJ·mol −1 predominant at low temperatures.