Effect of Sintering Time on the Optimal Synthesis Condition in MgB 2

J. Ishiwata, Muralidhar Miryala, N. Koshizuka, Kazuo Inoue, Masato Murakami

Research output: Contribution to journalConference article


The present investigation has focused on methods to improve the critical current density (J c ) of the disk-shape bulk MgB 2 superconductor by optimizing sintering conditions. The samples have been synthesized using a two-step process. The samples are sintered at 775 o C for 3 h in pure argon atmosphere, followed by re-sintering at 660 o C for 24 to 100 hours. X-ray diffraction showed that all the samples re-sintered are single phase and homogenous. The magnetization measurements confirm a sharp superconducting transition with T c (onset) at around 37 K. The critical current density (J c ) for MgB 2 samples increases with increasing the re-sintering time at 660 o C, in that the highest J c value of 170 kA/cm 2 at 20 K was obtained in the sample re-sintered at 660 o C for 100 h.

Original languageEnglish
Pages (from-to)102-105
Number of pages4
JournalPhysics Procedia
Publication statusPublished - 2013 Jan 1
Event26th International Symposium on Superconductivity, ISS 2013 - Tokyo, Japan
Duration: 2013 Nov 182013 Nov 20


  • critical current density (J )
  • MgB
  • two-step process
  • x-ray diffraction

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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