Abstract
The effect of postannealing on the structural and superconducting properties of Bi-2212 sintered ceramic samples prepared by the solid state reaction method has been investigated. Postannealing times were varied from 0 h to 192 h at 700 ∘C. Electrical resistivity studies showed that postannealed samples at 96 h have the lowest room temperature values while critical transition temperature does not change significantly. XRD data have shown that the Bi-2212 phase content does not change noticeably, independently of the postannealing length. In addition, J c values, calculated from the hysteresis loops using the Bean’s model, increased with increasing the postannealing time until 48 h and decrease for longer ones.
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Acknowledgements
All samples have been prepared in the MEİTAM Central Laboratory in Mersin University in Turkey. SEM measurements have been made in the MEİTAM Central Laboratory in Mersin University; other measurements in this study have been made in the METU Central Laboratory in the Middle East Technical University in Ankara, Turkey.
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Özkurt, B., Madre, M.A., Sotelo, A. et al. The Influence of Postannealing on Structural and Superconducting Properties of Bi-2212 Ceramics. J Supercond Nov Magn 26, 3247–3252 (2013). https://doi.org/10.1007/s10948-013-2193-5
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DOI: https://doi.org/10.1007/s10948-013-2193-5