Strong influence of precursor powder on the critical current density of Fe-sheathed MgB<sub>2</sub>tapes
Strong influence of precursor powder on the critical current density of Fe-sheathed MgB<sub>2</sub>tapes
The effect of the quality of starting powders on the microstructure and superconducting properties of in-situ processed Fe-sheathed MgB 2 tapes has been investigated.Three different types of commercial atomized spherical magnesium powder and two different purities of amorphous boron powder were employed.When using the 10-micrometre magnesium as precursor powders, the …