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Nonstoichiometry in Pure and Zr‐Doped Yttria Ceramics: An EXAFS and XPS Study
Author(s) -
Duraud JeanPaul,
Jollet Francois,
Thromat Nathalie,
Gautier Martine,
Maire Philippe,
Le Gressus Claude,
Dartyge Elisabeth
Publication year - 1990
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.1151-2916.1990.tb07614.x
Subject(s) - yttria stabilized zirconia , x ray photoelectron spectroscopy , materials science , extended x ray absorption fine structure , stoichiometry , ionic bonding , doping , ceramic , analytical chemistry (journal) , absorption spectroscopy , chemistry , ion , cubic zirconia , chemical engineering , metallurgy , physics , optoelectronics , organic chemistry , chromatography , quantum mechanics , engineering
Nonstoichiometry is exhibited by many ceramics at very high temperatures. The high‐temperature treatment of yttria, in particular, can induce a large concentration of point defects that changes the electrical and mechanical behavior of the solid. In the present study, the electronic and geometric structures of nonstoichiometric pure and Zr‐doped yttria are examined by X‐ray photoelectron spectroscopy and X‐ray absorption. The results show that the doping atom influences the level of stoichiometry, as well as the induced disorder and the change in the partial ionic character of the Y‐O bond.