The present investigation focuses on methods to further improve the J c values of disk-
shaped bulk MgB 2 superconductors by optimizing the sintering conditions. We prepared …

We prepared bulk MgB2 from high‐purity commercial powders of Mg metal (99.9% purity)
and amorphous B (99% purity) powders using a single‐step solid state reaction at 775° C for …

The present paper focuses on methods of further improving the flux pinning and critical
current density of disk-shaped MgB 2 bulk superconductors by adding excess Mg metal in …

MgB 2 bulks were synthesized by the solid-state reaction of Mg and B at 600 C and their
superconducting properties were compared with samples heated at 850 C. The samples …

In previous studies, we found that bulk MgB 2 contained numerous voids in various shapes
and sizes. With the aim of improving the critical current density as well as the mechanical …

In this study, we report on a further improvement of the critical current density of the sintered
bulk MgB 2 material utilizing the optimized sintering temperature combined with a varying …

Systematic research on the improvement in J c of MgB 2 bulks by the optimization of
sintering conditions was performed by applying a highly reproducible fabrication method …

We selected amorphous, nano-size carbon black (10–30nm) as a dopant for MgB2
superconductor to improve critical current density (Jc) at high magnetic field. We fabricated …

We present the superconducting properties and phase compositions of Mg 1− x Zr x B 2 bulk
samples fabricated by a solid-state reaction at ambient pressure. It is found that a small …

MgB 2 bulks were produced by in situ solid-state reaction in Ar gas using high-purity
commercial powders of Mg metal and amorphous nano-B mixed in a fixed ratio of Mg: B= 1 …