1 Risø National Laboratory for Sustainable Energy, Technical University of Denmark2 unknown3 Department of Energy Conversion and Storage, Technical University of Denmark4 Department of Physics, Technical University of Denmark
An experimental study of the effect of MgO content in the MgB2 powder used for ex situ made composite wires was carried out. Two single-core MgB2/Fe/Cu wires were made using commercial MgB2 powders from Alfa Aesar containing different fraction of MgO. Critical temperature and critical currents of as-deformed and heat-treated wires were measured. The differences between the wires are discussed and correlated with the MgO content. It was found that by increasing the amount of MgO, the inter-grain connectivity worsens, but well distributed and low size MgO particles improve flux pinning.
Superconductor Science and Technology, 2004, Vol 17, Issue 10