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Enhancement in critical current density and irreversibility field of bulk MgB2 by C and CaCO3 co-addition


Citation

Tan, Kean Sheng and Chen, Soo Kien and Jun, B. H. and Kim, C. J. (2008) Enhancement in critical current density and irreversibility field of bulk MgB2 by C and CaCO3 co-addition. Superconductor Science and Technology, 21 (10). ISSN 0953-2048

Abstract / Synopsis

Paper ash, a source of C and CaCO3, was used for the first time as a cheap form of sub-micron particles for doping. 0–10 wt% of the ash was added to Mg + 2B and in situ reacted at 850 ◦C for 30 min in flowing Ar atmosphere. The CaCO3 decomposed and reacted with B to form CaB6 as an impurity phase. Also, the Tc and the a-axis lattice parameter decreased with increasing ash content, which suggests that C substitution at boron sites occurred. Enhancement of high-field Jc(H), Hirr(T ) and Hc2(T ) was observed with an optimum level of about 5 wt% ash addition


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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
DOI Number: 10.1088/0953-2048/21/10/105013
Publisher: Institute of Physics
Keywords: Paper ash, C and CaCO3, superconductor
Depositing User: Najwani Amir Sariffudin
Date Deposited: 20 May 2010 09:40
Last Modified: 20 Jan 2016 14:57
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1088/0953-2048/21/10/105013
URI: http://psasir.upm.edu.my/id/eprint/6647
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