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Lattice Parameters and Densities of Rare‐Earth Oxide Doped Ceria Electrolytes
Author(s) -
Hong Seong Jae,
Virkar Anil V.
Publication year - 1995
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.1151-2916.1995.tb08820.x
Subject(s) - dopant , vacancy defect , doping , materials science , oxide , lattice (music) , oxygen , ionic radius , cubic zirconia , radius , ion , inorganic chemistry , condensed matter physics , chemical physics , crystallography , chemistry , ceramic , metallurgy , physics , optoelectronics , organic chemistry , acoustics , computer security , computer science
Lattice parameters and densities of various rare‐earth oxide doped ceria were measured. For the calculation of lattice parameters, the concept of the oxygen vacancy radius was introduced. The estimated oxygen vacancy radius was 1.164 A for trivalent, rare‐earth oxide doped ceria and 0.993 A for zirconia. The modeling of the lattice parameter and density based on the oxygen vacancy radius generally agreed with experimental results. The density measurements illustrate that oxygen vacancy formation is the predominant defect reaction. Evidence of some interstitial contribution was also noted for smaller‐sized dopant cations such as Yb 3+ and Er 3+ .