Properties of ${\rm MgB}_{2}$ Tapes Prepared by Using MA In-Ex Situ Powder

${\rm MgB}_{2}$ single-filament tapes and wires with Monel/Nb sheath were produced by the Powder in Tube (PIT)—technique using MA in-ex situ powder. This powder prepared by mechanical alloying (MA) of Mg and B was finally reacted to ${\rm MgB}_{2}$ at 700$^{\circ}{\rm C}$. The amount of ${\rm MgB}_{2}$ after annealing was about 91 wt%. Additionally 9 wt% MgO secondary phase was found. The primary crystallite size was about 25 nm.