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3. Preparation and critical current density of a Bi-based superconducting whisker composite

Author

Funahashi, Ryoji, Matsubara, Ichiro, Kusumi, Shinji, Ogura, Toru, Yamashita, Hiroshi, and Dimesso, Lucangelo

Subjects
Crystal whiskers -- Analysis, Superconductors -- Electric properties, Physics
Abstract

The preparation of a Bi2Sr2CaCa2Ox (Bi-2212) superconducting whisker composite consisting of Bi-2212 powder and Bi-2212 superconducting whiskers involves independent preparation of the powder and whisker and mixing at a weight ratio of 1.0/0.005 (powder/whisker) followed by sintering in air. X-ray diffraction studies reveal the parallel alignment of the ab plane of the whisker with the pressed plane in the composite. Scanning electron microscope helps analyze the surface and cross-section of the samples. Critical current density of the whisker composite is larger than that of a sintered sample without whiskers and this increase is due to the function of whiskers as bypasses for superconducting current.

Published
1994

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