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Your search keyword '"Sparvieri, N."' showing total 2 results
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2 results on '"Sparvieri, N."'

1. Directional solidification of bulk (Y,Sm,Nd)1Ba2Cu3O7-x

Author

Boffa, M., Di Trolio, A., Pace, S., Saggese, A., Vecchione, A., Camarota, B., and Sparvieri, N.

Subjects
Bulk solids -- Research, Rare earth metals -- Magnetic properties, High temperature superconductors -- Research, Business, Electronics, Electronics and electrical industries
Abstract

Rare earth elements with large ionic radius were substituted for yttrium in Y123 superconducting melt textured bulk samples. The solidification rate in (Nd,Sm)123 was found to significantly increase in a wider solidification range and higher recrystallization rate than Y123. Comparisons were also conducted among directionally solidified (Y,Sm,Nd)1Ba2Cu3O7-x bulk bars developed using the horizontal Bridgman method.

Published
1997

2. Room temperature oxidation of YBCO thin-film by microsecond pulsed electrolysis in aqueous solution

Author

Boutet, M., Di Gioacchino, D., Celani, F., Spallone, A., Tripodi, P., Polichetti, M., Cocciolo, P., and Sparvieri, N.

Subjects
High temperature superconductors -- Research, Yttrium barium copper oxides -- Research, Electrolysis -- Research, Thin films -- Electric properties, Business, Electronics, Electronics and electrical industries
Abstract

The use of microsecond pulsed deposition to achieve anodic oxidation of YBa2Cu3O(7-x) thin films at room temperature is investigated. Specifically, currents of up to 15.2 A were applied to oxygen-deficient thin films in aqeous solution at five kilohertz for a period of 1.3 microsecond. The procedure, which enhanced the oxygen stoichiometry of the films, restored the superconducting capabilities and modified the microstructure of the films.

Published
1995

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