Abstract
The present investigation has focused on methods to improve the critical current density (Jc) of the disk-shape bulk MgB2 superconductor by optimizing sintering conditions. The samples have been synthesized using a two-step process. The samples are sintered at 775oC for 3 h in pure argon atmosphere, followed by re-sintering at 660oC 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 Tc (onset) at around 37 K. The critical current density (Jc) for MgB2 samples increases with increasing the re-sintering time at 660 oC, in that the highest Jc value of 170 kA/cm2 at 20 K was obtained in the sample re-sintered at 660 oC for 100 h.
Original language | English |
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Pages (from-to) | 102-105 |
Number of pages | 4 |
Journal | Physics Procedia |
Volume | 58 |
DOIs | |
Publication status | Published - 2014 |
Event | 26th International Symposium on Superconductivity, ISS 2013 - Tokyo, Japan Duration: 2013 Nov 18 → 2013 Nov 20 |
Keywords
- MgB
- critical current density (J)
- two-step process
- x-ray diffraction
ASJC Scopus subject areas
- Physics and Astronomy(all)