Combustion method of preparing Bi-Pb-Sr-Ca-Cu-O superconductors

Authors

Antonio B. Villaflor ⋅ PH National Institute of Physics, University of the Philippines Diliman
Agham-Bayan S. Posadas ⋅ PH National Institute of Physics, University of the Philippines Diliman
Katherine D. Develos ⋅ PH National Institute of Physics, University of the Philippines Diliman
Mildred D. Reyes ⋅ PH National Institute of Physics, University of the Philippines Diliman
Susan Fontanilla ⋅ PH Physics Department, De La Salle University, Manila

Abstract

The successful application of a new process called the combustion technique in the preparation of Bi-Pb-Sr-Ca-Cu-0 superconductors is reported. As in the usual solid state reaction method, lead doping was found to increase the critical temperature (Tc) and the volume fraction of the high Tc phase. The diamagnetic response of the pellets below superconducting transition temperatures was also observed to be dependent on the pelletizing pressure. Using Bi₂O₃ and PbO as precursors yields generally higher volume fractions of the high Tc phase as evidenced by powder X-ray diffraction. Using nitrates and carbonates as precursors yields a low Tc superconducting phase with transitions at around 64K. The highest Tc onset was observed to be 108K using ac magnetic susceptibility measurements in samples prepared using bismuth carbonate and bismuth nitrate.

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Issue

1992: Proceedings of the International Conference on Physics and Technology in the 1990's

Article ID

ICPT-1992-SM-07

Section

Condensed Matter Physics, Superconductivity and Materials Physics

Published

1992-12-01

How to Cite

[1]

AB Villaflor, A-BS Posadas, KD Develos, MD Reyes, and S Fontanilla, Combustion method of preparing Bi-Pb-Sr-Ca-Cu-O superconductors, Proceedings of the Samahang Pisika ng Pilipinas 10, ICPT-1992-SM-07 (1992). URL: https://proceedings.spp-online.org/article/view/ICPT-1992-SM-07.