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

Published

August 1, 2002

Author(s)

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

Abstract

The phase diagrams of the BaO-Gd₂O₃-CuO_z and BaO-Er₂O₃-CuO_z 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-CuO_z system was confirmed to be similar to that of the Y-analog. The diagram of the BaO-Gd₂O₃-CuO_z 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 Ba₄Rcu₃O_z (413) and Ba₆Rcu₃O_z (613) phases exist, the absence of the Ba₃R₄O₉ phase affects the tie-line relations in the region bounded by BaO, BaGd₂O₄, GaGd₂CuO₅ and Ba₆GdCu₃O_z.

Citation

Physica C-Superconductivity and Its Applications

Volume

377

Issue

No. 1-2

Pub Type

Journals

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-R₂O₃-CuO_x System Under Carbonate-Free Conditions at P_O₂ = 100 Pa and at p(_O₂)=21kPA, Physica C-Superconductivity and Its Applications (Accessed October 1, 2025)