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Enhanced critical current density of ex situ MgB2 via control of Mg assisted sintering


Mohd Hapipi, Nurhidayah and Chen, Soo Kien and Shaari, Abdul Halim and Awang Kechik, Mohd Mustafa and Lim, Kean Pah and Tan, Kar Ban and Lee, Oon Jew and Arvapalli, Sai Srikanth and Miryala, Muralidhar (2022) Enhanced critical current density of ex situ MgB2 via control of Mg assisted sintering. Journal of Materials Science: Materials in Electronics, 33. 11257 - 11268. ISSN 0957-4522; ESSN: 1573-482X


In this work, ex situ MgB2 was mixed with 0.5 mol of Mg and sintered. The sintering conditions were varied over a temperature range of 600–1000 °C for 1, 3, and 7 h, respectively. The addition of Mg during the sintering increased the partial pressure of Mg and thus suppressed the decomposition of MgB2. Onset of critical temperature, Tc, was retained at ∼ 38 K even after the addition of Mg. By increasing the sintering temperature, magnetic critical current density, Jc at self-field, and 20 K of the ex situ samples increased consistently. With the addition of Mg for 1 h sintering, self-field Jc (20 K) was enhanced more than 20 times to 104 A cm−2 as the sintering temperature was increased. Such significant enhancement in the Jc is mainly due to the improved grain coupling aided by Mg during the short sintering.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
Institute of Advanced Technology
DOI Number: https://doi.org/10.1007/s10854-022-08101-3
Publisher: Springer
Keywords: Grain boundaries; Superconductors; Sintering conditions
Depositing User: Ms. Che Wa Zakaria
Date Deposited: 19 Oct 2023 22:33
Last Modified: 19 Oct 2023 22:33
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1007/s10854-022-08101-3
URI: http://psasir.upm.edu.my/id/eprint/101260
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