Impact of functionalized SiC nano-whisker on the flux pinning ability and superconductor features of Bi-2223 ceramics

In this study, we investigated the role of silicon carbide nano-whisker (SiC-NW) as new pinning center on the microstructure, magnetic and flux pinning properties of (BiPb)2Sr2Ca2Cu3O10+θ (Bi-2223) superconductors prepared by the sol-gel method. The surface of the nano-whiskers was modified with Azo...

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Bibliographic Details
Published in:Ceramics international 2021-02, Vol.47 (3), p.3706-3712
Main Authors: Fallah-Arani, Hesam, Baghshahi, Saeid, Sedghi, Arman
Format: Article
Language:English
Subjects:
Bi-2223 ceramics
Grain morphology
Magnetic properties
Nano-whisker
SiC
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Summary:In this study, we investigated the role of silicon carbide nano-whisker (SiC-NW) as new pinning center on the microstructure, magnetic and flux pinning properties of (BiPb)2Sr2Ca2Cu3O10+θ (Bi-2223) superconductors prepared by the sol-gel method. The surface of the nano-whiskers was modified with Azobisisobutyronitrile (AIBN) to improve their dispersions. The grafting of AIBN on the surface of SiC-NW was studied with FTIR. According to the field emission scanning electron microscope, X-ray diffraction, and magnetization measurements, we found an enhancement in the superconducting features of the specimen with the addition of SiC-NW up to 0.2 wt%. The microstructure of the samples showed randomly oriented plate-like grains. The connectivity and alignment of the grains slightly reduced with the increase in the SiC-NW concentration. Based on the magnetic measurement of the synthesized samples, an improvement of magnetization, pinning force ability and the critical current density (Jc) was observed for the 0.2 SiC-NW.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2020.09.226