Výsledky vyhledávání - "Siri, Antonio Sergio"

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Programmable Mechanical Resonances in MEMS by Localized Joule Heating of Phase Change Materials

Autor: Manca, Nicola, Pellegrino, Luca, Kanki, Teruo, Yamasaki, Syouta, Tanaka, Hidekazu, Siri, Antonio Sergio, Marré, Daniele

Publikováno v: Adv. Mater. 25, 6430-5 (2013)

A programmable micromechanical resonator based on a VO2 thin film is reported. Multiple mechanical eigenfrequency states are programmed using Joule heating as local power source, gradually driving the phase transition of VO2 around its Metal-Insulato

Externí odkaz: http://arxiv.org/abs/1702.06194

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Grain size determination of superconducting MgB2 powders from magnetization curve, image analysis and surface area measurement

Autor: Vignolo, Maurizio, Bovone, Gianmarco, Bellingeri, Emilio, Bernini, Cristina, Romano, Gennaro, Buscaglia, Mariateresa, Buscaglia, Vincenzo, Siri, Antonio Sergio

Publikováno v: Supercond. Sci. Technol. 27, 065007, 2014

The present article reports a method for the average grain size evaluation of superconducting nano-particles through their magnetic properties. The use of SQUID magnetometry to determine the average MgB2 particle size was investigated and the results

Externí odkaz: http://arxiv.org/abs/1405.4675

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A novel process to produce amorphous nano-sized B useful for MgB2 phase synthesis

Autor: Vignolo, Maurizio, Romano, Gennaro, Bernini, Cristina, Martinelli, Alberto, Siri, Antonio Sergio

Publikováno v: IEEE Transactions on Applied Superconductivity, 22, 4, 2012

In this paper we report a new synthesis route to produce boron powders characterized as being amorphous and having very fine particle size. This route has been developed to improve the performances of superconducting MgB2 powders, which can be direct

Externí odkaz: http://arxiv.org/abs/1405.4112

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High temperature heat treatment of B precursor and P.I.T. process optimization to increase Jc performances of MgB2-based conductor

Autor: Vignolo, Maurizio, Bovone, Gianmarco, Bernini, Cristina, Kawale, Shrikant, Palenzona, Andrea, Romano, Gennaro, Siri, Antonio Sergio

Publikováno v: Supercond. Sci. Technol. 26, 105022, 2013

Promising results reported in our previous works led us to think that production of B powder plays a crucial role in MgB2 synthesis. A new method for boron preparation has been developed in our laboratory. This particular process is based on magnesio

Externí odkaz: http://arxiv.org/abs/1405.4099

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