MgB2 Superconductor: Difference between revisions
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=== Preparing Samples === | === Preparing Samples === | ||
1) Weigh appropriate amounts of Mg and B powders. [[Media | 1) Weigh appropriate amounts of Mg and B powders. [[Media:Calculation_of_Mg_%26_B_amounts_to_make_sample_of_MgB2_Superconductor.pdf | Use this calculation as a guide]]. <br> | ||
2) Mix and grind powders (in mortar) for ~ 15 minutes.<br> | 2) Mix and grind powders (in mortar) for ~ 15 minutes.<br> | ||
3) Pack and press the resulting powder into sheathing material.<br> | 3) Pack and press the resulting powder into sheathing material.<br> | ||
Latest revision as of 17:44, 14 May 2018
MgB2 Superconductor Project
Preparing Samples
1) Weigh appropriate amounts of Mg and B powders. Use this calculation as a guide.
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) in stainless steel (SS) boat. Possibly under continuous argon flow.
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 samples should have reasonably low (room temp) resistivities (on the order of 0.001 Ohm x cm). The resistance R = (resistivity x length)/area.