Table of Contents
Journal of Solid State Physics
Volume 2014, Article ID 716032, 7 pages
http://dx.doi.org/10.1155/2014/716032
Research Article

Investigation of Structural Formation of Starting Composition 2245 in the Bi-Pb-Sr-Ca-Cu-O System Superconductors

1Department of Physics, Christ University, Bangalore 560 029, India
2Department of Physics, Government First Grade College, K R Puram, Bangalore 560 036, India

Received 5 June 2014; Revised 7 August 2014; Accepted 8 August 2014; Published 15 September 2014

Academic Editor: Veer P. S. Awana

Copyright © 2014 Ashoka Nukkanahalli Venkataswamy et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Structural formation of Bi1.65Pb0.35Sr2Ca4Cu5Oy (2245 phase) superconducting compound was investigated by preparing the sample in a new matrix route. The phases formed at different intervals of heat treatment are monitored by X-ray diffraction studies. Bi-2212 phase was found to be the predominant phase till 20 hours of sintering at 850°C after which Bi-2223 phase was found to be the major phase. Traces of Ca2PbO4 were also noticed along with 2212 and 2223 phases. For the first time, the highest onset of 127 K with maximum superconducting volume fraction was observed for the sample sintered at 850°C for 30 hours in this preparation. Further sintering is found to deteriorate the onset value of the sample. There was no signature of the formation of 2234 or 2245 phase in this synthesis.