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Formation of Bi-2212 superconducting whiskers from melt-quenched BSCCO containing alumina

Published online by Cambridge University Press:  03 March 2011

Toshihiro Kasuga ,
Masayasu Ono ,
Kenji Tsuji ,
Yoshihiro Abe ,
Koichi Nakamura  and
Eikichi Inukai
Toshihiro Kasuga*
Affiliation:
Department of Materials Science and Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466, Japan
Masayasu Ono
Affiliation:
Department of Materials Science and Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466, Japan
Kenji Tsuji
Affiliation:
Department of Materials Science and Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466, Japan
Yoshihiro Abe
Affiliation:
Department of Materials Science and Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466, Japan
Koichi Nakamura
Affiliation:
Department of Electrical and Computer Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466, Japan
Eikichi Inukai
Affiliation:
Chubu Electric Power Co. Inc., Oodaka, Midori-ku, Nagoya 459, Japan
*
a)Address all correspondence to this author.
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Abstract

Bi–Sr–Ca–Cu–O (BSCCO) superconducting whiskers (2212 phase) were prepared by heating in air the compacted specimens of the mixtures of melt-quenched Bi2SryCa2Cu4Al1Ox powders and alumina powders. Formation of the whiskers depends on the composition and the applied pressure of the compacts. The optimum composition of the melt-quenched products for preparing the long whiskers is Bi2Sr2Ca2Cu4Al1Ox. Superconducting whiskers <1 mm in length (2212 phase) containing an excess amount of copper were grown numerously from the specimen compacted at 20 MPa; long whiskers (2212 phase) of 1–5 mm in length were obtained from that compacted at 180 MPa. These whiskers showed diamagnetic signals below Tc ≃ 80 K.

Type
Articles
Information
Journal of Materials Research , Volume 9 , Issue 5 , May 1994 , pp. 1098 - 1103
Copyright
Copyright © Materials Research Society 1994

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References

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