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Defect Equilibria and Transport in YBa 2 Cu 3 O 7‐x at Elevated Temperatures: II, Nonstoichiometry
Author(s) -
Nowotny Janusz,
Rekas Mieczyslaw
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.tb05155.x
Subject(s) - valency , cuprate , copper , lattice constant , oxygen , intercalation (chemistry) , ion , oxide , superconductivity , chemistry , materials science , inorganic chemistry , crystallography , analytical chemistry (journal) , mineralogy , condensed matter physics , metallurgy , physics , diffraction , philosophy , linguistics , organic chemistry , optics , chromatography
Aspects of nonstoichiometry for the Y‐Ba‐Cu (1: 2: 3) system are considered. The general formula YBa 2 Cu 3 O 7‐x has been assumed for considerations of nonstoichiometry in 1: 2:3 oxide cuprates. Assuming that copper ions may occupy different lattice positions (independently of their valency), the equilibrium constants for oxygen intercalation were determined: