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Phase Equilibria of Ag with (Bi,Pb)-Sr-Ca-Cu-O (BSCCO) Oxides and With Superconducting Pb2223 Under Various Oxygen Pressures

Published

Author(s)

Lawrence P. Cook, Winnie K. Wong-Ng

Abstract

The partial phase diagrams of Ag with the constituent oxides of the Pb-BSCCO system (Pb,Bi:Sr:Ca:Cu:O) have been investigated, with emphasis on initial melting. These diagrams include the binary systems Ag-SrO, Ag-CaO, Ag-CuO, Ag-Bi2O3, Ag-PbO, and the pseudo-binary system Ag-Pb2223. In the latter system, dissolution of Ag into the Pb-BSCCO liquid occurrs at a mole fraction of 2.8% under 7.5 volume % O2, for the bulk composition investigated. A total mole fraction of 3% - 4% metal oxides was found to dissolve contact with the Pb2223 liquid during one-hour experiments. The amount of dissolution appears to increase slightly with increasing oxygen partial pressure. These interactions could lead to significant chemical modification at the Ag/Pb2223 superconductor interface.
Citation
Ceramic Transactions
Volume
104

Keywords

Ag interactions, BSCCO, high Tc superconductors, melting, phase diagrams

Citation

Cook, L. and Wong-Ng, W. (2000), Phase Equilibria of Ag with (Bi,Pb)-Sr-Ca-Cu-O (BSCCO) Oxides and With Superconducting Pb2223 Under Various Oxygen Pressures, Ceramic Transactions (Accessed November 29, 2023)
Created October 1, 2000, Updated February 19, 2017