APPLICATION OF BI-2212 SUPERCONDUCTING WHISKERS FOR THICK-FILMS

Two types of Bi-2212 thick films using Bi-2212 superconducting whisker s have been prepared. One is composite films incorporating the whisker s (20 wt.%). The composite films have been prepared by an isothermal p artial melting method. It is found that the incorporation of the whisk ers is effective for overcoming weak links at grain boundaries. In con sequence, J(c) for the composite film is about three times higher than for a film without whiskers (monolithic film). The other is in-plane aligned Bi-2212 thick films consisting of only whiskers. The in-plane aligned films have been prepared by hot pressing the a-axis aligned wh isker preforms. J(c) for the in-plane aligned film is two times higher than for the in-plane random thick film.