Comparative Study On The Transport Critical Current Density Of Bi-2223 And Tl-1212 Ag-Sheathed Superconductor Tapes In Low Magnetic Fields

Abd Shukor, Roslan and Lau, Kok Tee and Chen, Soo Kien (2002) Comparative Study On The Transport Critical Current Density Of Bi-2223 And Tl-1212 Ag-Sheathed Superconductor Tapes In Low Magnetic Fields. Physica C, 377 (4). pp. 547-552. ISSN 0921-4534

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Abstract

High-Tc superconductor tapes with nominal compositions of Bi1.8Pb0.4Sr2Ca2.2Cu3O10−x (Bi-2223) and (Tl,Cr0.15)Sr2(Ca0.9,Pr0.1)Cu2O7−x (Tl-1212) were fabricated using the powder-in-tube method. The View the MathML source’s of the tapes, which were subjected to various thermo-mechanical treatments, ranged from 100–103 K for the Bi-2223/Ag tapes and 84–86 K for the Tl-1212/Ag tapes. Their transport critical current densities in low magnetic fields (0.15 T) were compared. All the tapes are dominated by weak links where this is more severe in the Tl-1212/Ag tapes. No significant anisotropic transport properties were observed in Tl-1212/Ag tapes when the magnetic field was applied perpendicular or parallel to the tape plane (i.e. Jc(H⊥)/Jc(H∥)=0.75–1.0). The Bi-2223/Ag tapes however show a pronounced anisotropic transport properties in applied magnetic field (i.e. Jc(H⊥)/Jc(H∥)=0.15–0.65). This can be associated with the microstructural difference between these two types of tapes. Scanning electron micrographs reveal the slightly aligned grains in the Bi-based tapes while randomly orientated grains were observed in the Tl-based tapes.

Item Type: Article
Uncontrolled Keywords: Anisotropic current density, Strong links, Tapes
Divisions: Faculty of Manufacturing Engineering > Department of Engineering Materials
Depositing User: Dr. Kok Tee Lau
Date Deposited: 19 Feb 2013 00:37
Last Modified: 09 Jul 2021 10:10
URI: http://eprints.utem.edu.my/id/eprint/6754
Statistic Details: View Download Statistic

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