TY - JOUR A2 - Awana, Veer P. S. AU - Venkataswamy, Ashoka Nukkanahalli AU - Chirayil, George Thomas AU - Kannaiyan, Srinivasan PY - 2014 DA - 2014/09/15 TI - Investigation of Structural Formation of Starting Composition 2245 in the Bi-Pb-Sr-Ca-Cu-O System Superconductors SP - 716032 VL - 2014 AB - 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 TC 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 TC onset value of the sample. There was no signature of the formation of 2234 or 2245 phase in this synthesis. SN - 2356-7643 UR - https://doi.org/10.1155/2014/716032 DO - 10.1155/2014/716032 JF - Journal of Solid State Physics PB - Hindawi Publishing Corporation KW - ER -