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Experimental and Thermodynamic Study of Nonstoichiometry in 〈YBa 2 Cu 3 O 7‐x 〉
Author(s) -
Lindemer Terrence B.,
Hunley John F.,
Gates Jacques E.,
Sutton Alfred L.,
Brynestad Jorulf,
Hubbard Camden R.,
Gallagher Patrick K.
Publication year - 1989
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.1151-2916.1989.tb05978.x
Subject(s) - thermodynamics , hydrogen , oxygen , materials science , solid solution , chemistry , analytical chemistry (journal) , physics , metallurgy , organic chemistry , chromatography
The dependence of the nonstoichiometry of 〈YBa 2 Cu 3 O 7−x 〉 (solid) has been studied over 5 orders of magnitude in oxygen pressure and from 573 to 1173 K. Hydrogen‐reduction methods for determining the absolute oxygen to‐metal ratio were developed. The resulting data were used to derive a chemical thermodynamic representation of the experimental variables. The data were used to derive a chemical thermodynamic representaltion of the experimental variables. The data were also compared with several other investigations to indentify the selfconsistent sets of data. The present data and thermodynamic data from the literature were correlated on an Ellingham diagram.