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The objective of this work is to improve the flux pinning performance of bulk MgB2 superconductors by dispersing nanometer-sized MgB4 particles. The high quality MgB4 material was produced, and the MgO rest in the powder was removed by HNO3 (1M) leaching. Several bulk polycrystalline samples were fabricated by means of the solid state reaction method with compositions MgB2 + x wt% of MgB4 (x=0, 2,...
Enhancement of the critical current density (Jc) in MgB2 bulk material is very important for engineering applications. It has been found that the optimization of the sintering temperature leads to high Jc values in bulk MgB2 material. In our recent work, the highest trapped field value was recorded in the sample sintered at 775oC. The present investigation has focused on methods to improve further...
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