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

Nurhidayah Mohd Hapipi, Soo Kien Chen, Abdul Halim Shaari, Mohd Mustafa Awang Kechik, Kean Pah Lim, Kar Ban Tan, Oon Jew Lee, Sai Srikanth Arvapalli, Muralidhar Miryala

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

In this work, ex situ MgB2was 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, Jcat 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 104A cm−2 as the sintering temperature was increased. Such significant enhancement in the Jcis mainly due to the improved grain coupling aided by Mg during the short sintering.

Original languageEnglish
Pages (from-to)11257-11268
Number of pages12
JournalJournal of Materials Science: Materials in Electronics
Volume33
Issue number14
DOIs
Publication statusPublished - 2022 May

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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