Fundamentals of the preparation of high‐TC, superconducting (Bi,Pb)2+XSr₂Ca₂Cu₃O10+δceramics

For the 2223 phase of the BiPbSrCaCuO superconductor , detailed knowledge of the phase relations and the homogeneity region are essential to the understanding of the fundamental issues influencing the processing of the materials. A six‐component system such as this would require a six‐dimensional phase diagram. Several ways to simplify the task to manageable dimensions, and the information one can obtain from a detailed investigation of this system are discussed.