Difference between revisions of "MgB2 Superconductor"
(→Preparing Samples) |
(→Preparing Samples) |
||
| (2 intermediate revisions by the same user not shown) | |||
| Line 2: | Line 2: | ||
=== Preparing Samples === | === Preparing Samples === | ||
| − | 1) Weigh appropriate amounts of Mg and B powders.<br> | + | 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> | ||
4) Mechanically deform sample (crush the core) into a slug, ribbon or wire.<br> | 4) Mechanically deform sample (crush the core) into a slug, ribbon or wire.<br> | ||
| − | 5) Heat (possibly two or more temps for two or more times)in stainless steel (SS) boat.<br> | + | 5) Heat (possibly two or more temps for two or more times) in stainless steel (SS) boat. Possibly under continuous argon flow.<br> |
=== Processing Post-Reacted Samples === | === Processing Post-Reacted Samples === | ||
| − | 1) Possibly mechanically deform again. | + | 1) Possibly mechanically deform again.<br> |
| − | 2) Possibly sinter again. | + | 2) Possibly sinter again.<br> |
2) Cut off sample ends (exposing clean sample cores).<br> | 2) Cut off sample ends (exposing clean sample cores).<br> | ||
3) Polish sample ends.<br> | 3) Polish sample ends.<br> | ||
| − | The processed | + | 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. |
| − | |||
| − | The resistance R = (resistivity x length)/area. | ||
Latest revision as of 09:44, 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.
