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Subsolidus Phase Relationships of the BaO-R2O3-CuOx System Under Carbonate-Free Conditions at PO2 = 100 Pa and at p(O2)=21kPA

Published

Author(s)

Winnie K. Wong-Ng, Lawrence P. Cook, J Suh

Abstract

The phase diagrams of the BaO-Gd2O3-CuOz and BaO-Er2O3-CuOz systems were determined at 0.1% O2 (810 C) using special apparatus and a procedure for preparing carbonate-free precursors based on BaO. The handling of these atmospherically sensitive compositions is described. The diagram of the BaO-Er2O3-CuOz system was confirmed to be similar to that of the Y-analog. The diagram of the BaO-Gd2O3-CuOz system exhibits different features as compared to the Er-analog. For example, in the Gd-system, while similar to the Er-analog in that both Ba4Rcu3Oz (413) and Ba6Rcu3Oz (613) phases exist, the absence of the Ba3R4O9 phase affects the tie-line relations in the region bounded by BaO, BaGd2O4, GaGd2CuO5 and Ba6GdCu3Oz.
Citation
Physica C-Superconductivity and Its Applications
Volume
377
Issue
No. 1-2

Keywords

BaO-R203-CuOx (R=GD and Er), phase diagrams, superconductors

Citation

Wong-Ng, W. , Cook, L. and Suh, J. (2002), Subsolidus Phase Relationships of the BaO-R<sub>2</sub>O<sub>3</sub>-CuO<sub>x</sub> System Under Carbonate-Free Conditions at P<sub>O</sub><sub>2</sub> = 100 Pa and at p(<sub>O</sub><sub>2</sub>)=21kPA, Physica C-Superconductivity and Its Applications (Accessed February 25, 2024)
Created August 1, 2002, Updated February 19, 2017