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The effect of different dwell times at a constant pelletization pressure of 6 GPa on superconducting properties of Bi1.8Sr2Ca1.1Cu2.1Oy ceramics

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Abstract

In this study, the physical and magnetic properties of Bi1.8Sr2Ca1.1Cu2.1Oy superconductors kept in different dwell times (1, 6, and 12 h) at a constant pelletization pressure of 6 GPa in the pressing step as prepared by standard solid-state reaction method are reported. The X-ray diffraction data shows that all samples have a tetragonal crystal structure with predominant Bi-2212. SEM micrographs for all samples predominately show plate-like grain structure, indicating the presence of Bi-2212 phase. Both Tc (onset) and Tc (offset) significantly increase with increasing dwell time. M–H measurements were performed at T = 10 and 25 K, respectively. In addition, Jc values of the samples were calculated from their magnetic hysteresis loops using the Bean’s model. It has been found that Jc in the samples including long dwell times under the pelletization pressure of 6 GPa improves.

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Acknowledgments

This work is supported by the BAP Research Fund of Mersin University, Mersin, Turkey, under Grant Contracts No: BAP-FBE ESMB (MEA) 2014-3 YL and BAP-TTEF MEOEB (İS) 2012-8 A. All samples have been prepared in the MEİTAM Central Laboratory in Mersin University in Turkey. Both SEM and XRD 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 Middle East Technical University in Ankara in Turkey.

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Authors and Affiliations

  1. Advanced Technology Research and Application Center, Mersin University, 33343, Yenisehir, Mersin, Turkey

    M. Ersin Aytekin & Berdan Özkurt

  2. Department of Energy Systems Engineering, Faculty of Tarsus Technology, University of Mersin, Mersin, Turkey

    Berdan Özkurt

  3. Department of Mechanical Engineering, Institute of Natural and Applied Sciences, Selçuk University, Konya, Turkey

    K. Banu Sugözü

  4. Department of Mechatronics Engineering, Faculty of Tarsus Technology, University of Mersin, Mersin, Turkey

    Ercan Köse

  5. Department of Automotive Engineering, Faculty of Tarsus Technology, University of Mersin, Mersin, Turkey

    İlker Sugözü

Authors
  1. M. Ersin Aytekin
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  2. Berdan Özkurt
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  3. K. Banu Sugözü
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  4. Ercan Köse
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  5. İlker Sugözü
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Correspondence to Berdan Özkurt.

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Aytekin, M.E., Özkurt, B., Sugözü, K.B. et al. The effect of different dwell times at a constant pelletization pressure of 6 GPa on superconducting properties of Bi1.8Sr2Ca1.1Cu2.1Oy ceramics. J Mater Sci: Mater Electron 27, 8068–8073 (2016). https://doi.org/10.1007/s10854-016-4805-x

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  • DOI: https://doi.org/10.1007/s10854-016-4805-x

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