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Superconducting glass-ceramics in BiSrCaCu2Al0.5Ox—Comparison between rod and powder compacted specimens

Published online by Cambridge University Press:  31 January 2011

Kazumi Hirata  and
Yoshihiro Abe
Kazumi Hirata
Affiliation:
Department of Materials Science and Engineering, Nagoya Institute of Technology, Gokiso-cho, Showaku, Nagoya 466, Japan
Yoshihiro Abe
Affiliation:
Department of Materials Science and Engineering, Nagoya Institute of Technology, Gokiso-cho, Showaku, Nagoya 466, Japan
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Abstract

Superconducting properties are studied for glass-ceramics which were prepared by reheating glass rods and the glass powder compacts in the BiSrCaCu2Al0.5Ox system, respectively. The glass-ceramic rod specimens obtained by reheating rod glass at 800–830 °C for 50 h have a Tc (R = 0) of 85 K, while the disk specimens obtained by reheating the powdered glass compacts in the same way do not exhibit superconductivity above 77 K. This difference in superconductivity between the specimens is discussed in terms of the crystallization process and the amount of oxygen absorption of the specimens during heating.

Type
Articles
Information
Journal of Materials Research , Volume 6 , Issue 6 , June 1991 , pp. 1156 - 1159
Copyright
Copyright © Materials Research Society 1991

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