کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1820434 1026087 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of Ag2CO3 addition on the morphology and physical properties of Bi-based (2223) high-Tc superconductors
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Effect of Ag2CO3 addition on the morphology and physical properties of Bi-based (2223) high-Tc superconductors
چکیده انگلیسی

The effect of Ag2CO3 addition (0–25 wt%) on the Bi1.6Pb0.4Sr2Ca2Cu3Oδ (Bi-2223) precursor powder has been investigated in terms of X-ray diffraction, scanning electron microscopy, dc electrical resistivity, critical temperature, ac magnetic susceptibility and critical current density. The samples were prepared by the conventional solid-state reaction method. The room temperature X-ray diffraction patterns of all the samples indicated the presence of large amount of Bi-(2223) phase along with minor amount of Bi-(2212) phase. The lattice structure of the material belongs to the orthorhombic unit cell. The volume fraction was estimated from the intensities of Bi-(2223) and Bi-(2212) phases. The sample with 5 wt% of added Ag shows the higher volume fraction of Bi-(2223) phase formed (86%). The dc electrical resistivity of all the samples decreases as the wt% of Ag increases. Both the onset critical Tc(onset) and zero electrical resistivity Tc(R = 0) temperatures were determined from the dc electrical resistivity and ac magnetic susceptibility measurements, which remains within the temperature range 110–113 ± 1 K and 101–106 ± 1 K respectively. Resistivity data agrees with ac magnetic susceptibility measurements. The critical current density for the 25 wt% Ag doped samples increased by three-times compared to the un-doped sample.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica C: Superconductivity and its Applications - Volume 449, Issue 2, 15 November 2006, Pages 139–147
نویسندگان
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