Preparation and Characterization of Bi-Pb-Sr-Ca-Cu-O High-Tc Phase Thick Films Printed with Superconductor Paste

Abstract

Superconductive thick film was prepared by the screen printing method on MgO polycrystalline substrate. Textured orientation with c-axis of the superconductive phase was shown in the XRD patterns. The paste was prepared by calcined powder of (Bi₁-_xPb_x)₂Sr₂Ca₂Cu₃Oy (x=0.2, 0.3, 0.4). In the film from the x=0.4 paste, high Tc and high Jc were obtained by short sintering time irrespective of an impurity phase growth of Ca₂PbO₄, etc. A CIP after printing and subsequent solvents drying was applied before sintering. The CIP improved strongly the textured orientation with c-axis and, therefore, the quality of the thick films.