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

AuthorsNane, O.; Özçelik, B.; Sotelo, A.; Madre, M. A.
Sodium substitution
Issue Date2017
CitationJournal of the European Ceramic Society 37(3): 1007-1012 (2017)
AbstractBulk textured BiSrCaNaCuO (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, T, 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 × 10 A/cm at 10 K for 0.075 Na sample which is about four times higher than the 0.34 × 10 A/cm value determined for the pure sample. The anisotropic properties of these textured materials have been investigated using magnetic measurements.
Publisher version (URL)https://doi.org/10.1016/j.jeurceramsoc.2016.09.035
Identifiersdoi: 10.1016/j.jeurceramsoc.2016.09.035
e-issn: 1873-619X
issn: 0955-2219
Appears in Collections:(ICMA) Artículos
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