Effect of Na substitution on superconducting properties of Bi-2212 ceramics prepared by Sinter-Forged process

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NANE O., ÖZÇELİK B., Sotelo A., Madre M.

Journal of the European Ceramic Society, vol.37, no.3, pp.1007-1012, 2017 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 37 Issue: 3
  • Publication Date: 2017
  • Doi Number: 10.1016/j.jeurceramsoc.2016.09.035
  • Journal Name: Journal of the European Ceramic Society
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1007-1012
  • Keywords: Anisotropy, Bi-2212, Sinter-Forging, Sodium substitution, Texturing
  • Hakkari University Affiliated: Yes


Bulk textured Bi2Sr2Ca1−xNaxCu2Oy (x = 0.0, 0.05, 0.075 0.1, 0.15, and 0.20) ceramics have been prepared by a polymer solution method followed by sinter-forging process. The microstructure and superconducting properties of textured samples were affected by Na substitution. According to XRD data, all samples show that Bi-2212 phase is the major one, and main peaks corresponded to the (00ℓ) diffractions confirming that the crystallographic c-axis is perpendicular to the surface. SEM micrographs showed that samples are composed of well-stacked and oriented grains. The best critical temperature, TC, was measured as 85.6 K for x = 0.075. The critical current density Jc, values decrease gradually with the increase of applied magnetic field. The maximum calculated Jc was 1.38 × 105 A/cm2 at 10 K for 0.075 Na sample which is about four times higher than the 0.34 × 105 A/cm2 value determined for the pure sample. The anisotropic properties of these textured materials have been investigated using magnetic measurements.