Improvement of structural and superconducting properties of Bi-2212 textured rods by substituting sodium

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Nane O., ÖZÇELİK B. , AMAVEDA H., Sotelo A., Madre M. A.

CERAMICS INTERNATIONAL, cilt.42, ss.8473-8477, 2016 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 42 Konu: 7
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1016/j.ceramint.2016.02.068
  • Dergi Adı: CERAMICS INTERNATIONAL
  • Sayfa Sayısı: ss.8473-8477

Özet

In this paper, the physical and superconducting properties of BizSr(2)Ca(1-x)Na(x)Cu(2)O(8+delta) with x=0.0, 0.05, 0.075, 0.1, and 0.20 textured superconducting fiber rods prepared by a laser floating zone (LFZ) technique were studied. The effects of Na+1 substitution for Ca2+ have been investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), transport measurements, dc-magnetization, magnetic hysteresis and magnetic critical current density. The powder XRD patterns of samples have indicated that Bi-2212 phase is the major one, independently of Na content. The best critical temperature, T-C, has been found as 93.3 K from M-T data for the sample with 0.075 Na substitution. The maximum magnetic J(C) value has been calculated as 1.35 x 10(5) A/cm(2) at 10 K for the 0.10 Na sample. The maximum transport critical current density has directly been measured as 1.3 x 10(3) A/cm(2) at 77 K for the 0.05Na sample. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.