Phase diagram studies in the system Bi - Pb - Sr - Ca - Cu - O - Ag

Abstract

Phase diagram studies with emphasis on the high temperature superconducting phases (2212 phase) and (2223 phase) are reviewed in this article. The phase relations of the and the homogeneity regions of the 2212 and 2223 phases have been studied in detail at various temperatures and oxygen partial pressures. However, the Pb-doped system has been investigated less comprehensively. The studies of this system are mostly focused on the 2212 and 2223 phase and the experimental work regarding the 2223 phase is often concentrated on the processing of 2223 samples with high critical current density and not on the preparation of single phase 2223 ceramics.