The chemistry and superconducting properties of species in the system Bi-Ca-Sr-Cu-O

Abstract
Experimental results are presented on efforts to maximize the content of the phase responsible for the 110 K superconducting transition, Bi2Ca2Sr2Cu3O2 or (2223), in the system Bi–Ca–Sr–Cu–O. It was found that the content of this phase depends not only on the initial composition of the reacting mixture, but also on the presence of PbO, the temperature of reaction, and the duration of the reaction.