We studied the Ti doping effect on the superconducting properties and microstructure of
sintered MgB 2 bulk polycrystals. Using Ti as a sintering assistant, we have fabricated MgB 2 …

The doping effect of Ti and Zr on the superconducting properties and the microstructure of
sintered MgB2 bulk materials has been studied. The transition metal is found to work as a …

The microstructure of the Ti-doped MgB 2 which shows a significantly improved critical
current density, J c [Appl. Phys. Lett. 79, 1154 (2001)], is investigated. It is found that Ti does …

Ti-doped MgB 2 superconductors with different doping levels were prepared by solid-state
reaction at ambient pressure. The density, diamagnetic signal, and J c of the samples …

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 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 order to improve the extrinsic superconducting properties of MgB2 a combination of
nanocrystalline microstructure and particle doping was studied with regard to the …

Samples of MgB 2 pure phase, with Ni nanoparticles addition, were prepared using a solid
diffusion reaction method. Clearly, the Ni nanoparticles act as effective pinning centers and …

The distribution of nanostructural inhomogeneities, such as areas with high concentration of
B and impurity O, plays one of the key roles on the variation of the critical current density, jc …

The improved performance of bulk MgB2 material with added nanometer‐sized MgB4
particles is presented. Bulk polycrystalline MgB2 samples with varying amount of MgB4 x (x …