Enhanced critical current density of MgB2 superconductor using a milled MgB4 precursor

A Comparative Study of Experimental and Simulated Trapped Magnetic Field of MgB2 Bulks Prepared by the Magnesium Vapor Transport Process

“…Several processes have been developed for MgB2 bulk fabrication, including the in-situ method [4], [6]- [9], in which a mixed powder of magnesium and boron reacts; the high-pressure synthesis method [10]- [16]; the diffusion method using liquid magnesium [17], [18]; and liquid phase assisted sintering [19]. In the conventional in-situ method, the packing factor of MgB2 is as low as around 50%, since the density of reacted MgB2 is higher than the density of the Mg/B precursor powders [6], [7].…”