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The Preparation of Bi-Pb-Sr-Ca-Cu-O Superconducting Powder for Thick Film Pastes

Published online by Cambridge University Press:  28 February 2011

J. Hagberg ,
A. Uusimäki ,
J. Levoska ,
S Leppävuori  and
R Rautioaho
J. Hagberg
Affiliation:
Microelectronics and Material Physics Laboratories and
A. Uusimäki
Affiliation:
Microelectronics and Material Physics Laboratories and
J. Levoska
Affiliation:
Microelectronics and Material Physics Laboratories and
S Leppävuori
Affiliation:
Microelectronics and Material Physics Laboratories and
R Rautioaho
Affiliation:
Materials Engineering Laboratory, University of Oulu, OULU, FINLAND
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Abstract

The oxalate route was used to prepare (Bi-Pb) -Sr-Ca-Cu-O powder with the nominal composition Bi1.75Pb0.4Sr1.3Ca2.1Cu3.2Oy. This powder was decomposed/annealed at different temperatures between 434 and 795°C. They were investigated by thermogravimetric analysis, X-ray diffraction and transmission electron microscopy. Particle size distribution and surface area were also determined. The specific surface area decreased from a value of 16.5 m2/g for powder decomposed at 434 °C to 1.0 m2/g for powder decomposed at 795 °C. The measured mean particle size reached a minimum of 0.52 juri for powder decomposed at 589 °C.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 401
Copyright
Copyright © Materials Research Society 1990

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References

1 Hagberg, J., Rautioaho, R., Levoska, J., Uusimäki, A., Murtoniemi, T., Kokkomäki, T. and Leppävuori, S., Accepted for publication in Materials Letters.Google Scholar
2 Hagberg, J., Uusimäki, A., Levoska, J. and Leppävuori, S., Physica C 160, 369 (1989).Google Scholar