MgB2 Superconductor

MgB2 Superconductor Project

Preparing Samples

1) Weigh appropriate amounts of Mg and B powders.
2) Mix and grind powders (in mortar) for ~ 15 minutes.
3) Pack and press the resulting powder into sheathing material.
4) Mechanically deform sample (crush the core) into a slug, ribbon or wire.
5) Heat (possibly two or more temps for two or more times).

Processing Post-Reacted Samples

1) Possibly mechanically deform again. 2) Possibly sinter again. 2) Cut off sample ends (exposing clean sample cores).
3) Polish sample ends.

The processed sample should have reasonably low (room temp) resistivities (rho on the order of 0.001 Ohm x cm).

The resistance R = (resistivity x length)/area.