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Enhanced Superconducting Properties in Bi2Sr2Ca1Cu1.75Na0.25Oy Ceramics Prepared by Hot-Pressing Under Different Pressures and Temperatures

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Abstract

Bi2Sr2Ca1Cu1.75Na0.25Oy ceramics have been prepared by the classical solid state reaction method followed by hot-pressing process under several applied pressures and temperatures: 22 and 33 MPa at 750 °C, and 22 MPa at 800 °C. X-ray diffraction data indicate that the major phase in all samples is the Bi2Sr2Ca1Cu1.75Na0.25Oy phase, accompanied by small amounts of Bi2CaO4 and Bi3Sr4CaCu3O4 secondary phases. Microstructural results clearly showed that the best grain orientation has been obtained under 33 MPa at 750 °C. Critical temperatures, TC (onset) and TC (offset), of these samples were significantly increased to 96.6 and 85.6 K, respectively, pointing out to a good intergranular coupling. M-H hysteresis curves for all samples display a very large area due to the microstructural characteristics obtained in these samples. The highest critical current density, calculated from M-H measurements according to Bean’s model, has been obtained in samples prepared under 33 MPa at 750 °C (201.5 × 104 A/cm2 at 1.9 T and 15 K), which are much larger than those reported for samples with the same composition prepared through the classical solid state method.

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Data Availability

The data that support the findings of this study are available from the corresponding author (Berdan Özkurt), upon reasonable request.

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Acknowledgements

All samples have been prepared in both the Physics Laboratory in Tarsus University, Türkiye, and the Department of Materials Science and Metallurgical Engineering in Zaragoza University, Spain. SEM analyses have been made in Universidad de Zaragoza, Spain, as other measurements in this study have been made in the Central Research Laboratory (ÇÜMERLAB) in Çukurova University, Adana. The authors would like to acknowledge the use of Servicio General de Apoyo a la Investigación-SAI, Universidad de Zaragoza.

Funding

This work is supported by the BAP Research Fund of Tarsus University, Mersin, Türkiye, under Grand Contract No. MF.21.004. M. A. Madre and A. Sotelo acknowledge the Gobierno de Aragón-FEDER (T54-20R) for funding.

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Authors and Affiliations

  1. Department of Energy Systems Engineering, Graduate School of Natural and Applied Science, Tarsus University, 33400, Tarsus, Turkey

    Bulut Öner & Berdan Özkurt

  2. Department of Management Information Systems, Faculty of Economics and Administrative Sciences, Tarsus University, 33400, Tarsus, Turkey

    Pinar Özkurt

  3. Instituto de Ciencia de Materiales de Aragón (CSIC, Universidad de Zaragoza), Ma de Luna 3, 50018, Zaragoza, Spain

    M. A. Madre & A. Sotelo

  4. Department of Natural and Mathematical Sciences, Faculty of Engineering, Tarsus University, 33400, Tarsus, Turkey

    Berdan Özkurt

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  1. Bulut Öner
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  4. Berdan Özkurt
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  5. A. Sotelo
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Contributions

All authors contributed to the study conception and design. Material preparation and analysis were performed by Bulut Öner, Pinar Özkurt, Maria Madre, Berdan Özkurt, and Andres Sotelo. The first draft of the manuscript was written by Berdan Özkurt and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Berdan Özkurt.

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Öner, B., Özkurt, P., Madre, M.A. et al. Enhanced Superconducting Properties in Bi2Sr2Ca1Cu1.75Na0.25Oy Ceramics Prepared by Hot-Pressing Under Different Pressures and Temperatures. J Supercond Nov Magn 35, 1831–1838 (2022). https://doi.org/10.1007/s10948-022-06211-x

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  • DOI: https://doi.org/10.1007/s10948-022-06211-x

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