Phase diagrams in CuOx based superconductors

Abstract

The users oriented need for HTSC phase diagrams is discussed including the melt-textured growth, formation of glass-ceramics and conventional sintering affecting the weaks links problems. CuO-based binaries (and associated stable/ metastable compoundg) are reviewed and jointly redrawn. The ternary system Y-Ba-Cu-(0) is survayed including the effect of oxycarbonates and Pt-substitutes. The most important pseu-dobinary cuts are also presented. The role of oxygen pressure is shown for the disordering and superstructure formation of YBa2Cu Ox as well as for the reactions to form the other phases. TAe system Bi-Ca-Sr-Cu-(0) is analysed from the viewpoint of existing data and collectively illustrated. Glass crystallization and inherent formation of HTSC phases is also noticed. A completed list of relevant literature is enclosed.