PROBLEMS OF OBTAINING HIGHLY TEXTURED HTSC COATINGS

Bi-containing ''2201'' and ''2212'' high temperature superconductor (H TSC) coatings have been obtained on silver substrates and wires using solution techniques. At different thermal conditions at least two stru cture modifications of the ''2201'' precursor phase are formed. These modifications have different morphology, chemical composition and crys tal structure. Features of the transition between the phases mentioned are discussed. Needle-like grains of the 2201 high temperature phase are shown to be textured along the wire axis. HTSC coatings of 2212 co mposition replicate the texture of the precursor phase 2201.