Authors:M. Mansori, C. Favotto, K. Jardet, M. Roubin, A. Sebaoun, and P. Satre
The oxygen exchange between the condensed phase(s) and the gas phase was studied as a function of temperature for superconducting
phases of the system (Bi,Pb)-Sr-Ca-Cu-O.
An oxygen probe apparatus allowed confirmation that the variation in oxygen composition in the Pb2212 and Pb2223 superconducting
phases is a reversible phenomenon on heating and cooling. It was demonstrated that the mass loss of both phases, for the 905
and 980°C isotherms, was due to the oxygen composition variation and to PbO loss (this latter phenomenon begin irreversible).