کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5440619 1398234 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of Na substitution on superconducting properties of Bi-2212 ceramics prepared by Sinter-Forged process
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Effect of Na substitution on superconducting properties of Bi-2212 ceramics prepared by Sinter-Forged process
چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 37, Issue 3, March 2017, Pages 1007-1012
نویسندگان
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