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Thermal expansion behavior of bulk Bi-based (2223) superconductors

Published online by Cambridge University Press:  31 January 2011

A. Bellosi ,
G. Celotti ,
E. Landi  and
A. Tampieri
A. Bellosi
Affiliation:
IRTEC-CNR, Research Institute for Ceramics Technology, via Granarolo 64, 48018 Faenza, Italy
G. Celotti
Affiliation:
IRTEC-CNR, Research Institute for Ceramics Technology, via Granarolo 64, 48018 Faenza, Italy
E. Landi
Affiliation:
IRTEC-CNR, Research Institute for Ceramics Technology, via Granarolo 64, 48018 Faenza, Italy
A. Tampieri
Affiliation:
IRTEC-CNR, Research Institute for Ceramics Technology, via Granarolo 64, 48018 Faenza, Italy
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Abstract

The thermal expansion coefficient of Bi-based 2223 and 2212 ceramics has been measured using dilatometric apparatus. Different typologies of bulk superconducting samples have been tested, in particular (2223) phase fully dense hot-pressed samples both parallel and perpendicular to the direction of applied pressure, pressureless sintered samples, and finally hot-pressed (2212) phase specimen, in order to gather information on the contribution of secondary phase to thermal expansion behavior. From the observed α (thermal expansion coefficient) values, accounting for the sample orientation degree, it was possible to distinguish the contributions along the basic crystallographic directions and to determine the following for (2223) phase: αa = 12.2 × 10-6 °C-1, and αc = 20.8 × 10-6 °C-1 for temperatures 200–600 °C. Theoretical α values were then calculated for the different samples and successfully compared with the measured ones. As regards (2212) phase, thermal expansion coefficient was evaluated for the oriented sample, and a value for random one extrapolated; the results are very similar to that of (2223), but lower with respect to previously reported data in air atmosphere.

Type
Articles
Information
Journal of Materials Research , Volume 11 , Issue 7 , July 1996 , pp. 1627 - 1634
Copyright
Copyright © Materials Research Society 1996

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References

REFERENCES

1.McN. Alford, N., Button, T. W., and Birchall, J.D., Supercond. Sci. Technol. 3, 1 (1990).CrossRefGoogle Scholar
2.Momin, A. C., Mirza, E. B., and Mathews, M. D., Int. J. Thermo-phys. 12, 585 (1991).Google Scholar
3.Arendt, H. R., Garbauskas, M. F., Meyer, C. A., Rotella, F. J., Jorgensen, J.D., and Hitterman, R. L., Physica C 182, 73 (1991).CrossRefGoogle Scholar
4.Tampieri, A., Landi, E., and Bellosi, A., Mater. Chem. Phys. 34, 157 (1993).CrossRefGoogle Scholar
5.Tampieri, A., Celotti, G., Ricciardiello, F., and Russo, G., Physica C 227, 300 (1994).CrossRefGoogle Scholar
6.Tampieri, A. and Babini, G. N., Jpn. J. Appl. Phys. 30, L1163 (1991).CrossRefGoogle Scholar
7.Johnson, D. W. Jr., and Rhodes, W. W., J. Am. Ceram. Soc. 72, 2346 (1989).CrossRefGoogle Scholar
8.Tkaczyk, J. E. and Lay, K. W., J. Mater. Res. 5, 1368 (1990).CrossRefGoogle Scholar
9.Kirchner, H. P., in Progress in Solid State Chemistry, edited by Reiss, H. (McMillan, New York, 1964), Vol. I, pp. 1–36.Google Scholar
10.O'Bryan, H. M., Thermochim. Acta 174, 223 (1991).CrossRefGoogle Scholar
11.Nomura, S., Yoshino, H., and Ando, K., J. Am. Ceram. Soc. 76, 2687 (1993).CrossRefGoogle Scholar
12.Chen, Y. L. and Stevens, R., J. Am. Ceram. Soc. 75, 1150 (1992).CrossRefGoogle Scholar
13.Takeda, Y., Kanno, R., Tanigawa, F., Yamamoto, O., Ikeda, Y., and Takano, M., Physica C 159, 789 (1989).CrossRefGoogle Scholar
14.Chen, Y. L. and Stevens, R., J. Am. Ceram. Soc. 75, 1160 (1992).CrossRefGoogle Scholar