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| Ultimo aggiornamento | 24 lug 2012 |
| Autore |
Andrea Maria
Camacho Romero |
| Sesso | F |
| Esperimento | NTA-SHAMASH |
| Tipo | Laurea Magistrale |
| Destinazione dopo il cons. del titolo | |
| Università | Università Di Padova |
| Strutt.INFN/Ente |
Lab. Naz. di Legnaro |
| Titolo | HIGH TEMPERATURE METATHESIS FOR THE PREPARATION OF Nb3GaAl SUPERCONDUCTORS |
| Abstract | This works deals with the A15 compound synthesis on niobium samples and over the internal surface of niobium cavities by means of induction heating. Specifically, three compounds were studied: Nb3Ga, Nb3Al and Nb-Al-Ga. As for the preparation of the niobium samples, they were treated with BCP solution in order to polish the surface. The niobium cavities were treated with centrifugal tumbling, BCP solution and high pressure water rising. Subsequent, the samples, or cavities, were placed into an inductor controlling the voltage, time, sample position, temperature, type and pressure of gas used. The highest critical temperature obtained was 18 K and Tc 0,35 K, in Nb-Al-Ga#1 sample by inductive measurement. Mapping analysis showed the uniform diffusion of aluminum into the niobium, and the gallium diffuses creating channels into niobium. The composition was measured by EDS obtaining (82±1)% wt. Niobium, (11,3±0,9)% wt. Gallium, (4,7±0,2)% wt. Aluminum and (1,9±0,1)% wt. Oxygen. Finally, RF test confirmed that the cavities obtained after the annealing were normal conductive indicating that the preparation parameters must still be optimized. |
| Anno iscrizione | 2010 |
| Data conseguimento | 21 dic 2011 |
| Luogo conseguimento | Padova |
| Relatore/i |
V. Palmieri A.A. Rossi |
| File PDF |
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| File PS | |
