A Carbon-Free Way for Obtaining Nanoscale Silicon

The nanosized silicon powder has been produced by reduction of silica with magnesium in an argon medium using both the mechanically activated self-propagating high-temperature synthesis and direct mechanochemical investigated X-ray phase analysis, Infrared spectroscopy, electron scanning microscopy, energy dispersive spectroscopy. optimal Mg:SiO2 ratio found to provide minimum content contaminant impurities silicide silicate synthesis. For first time, Si via implemented. Optimal component mechanical activation parameters have determined, yielding Si/MgO composites without impurity phases (magnesium silicate). A purification procedure proposed for separating obtained from oxide other phases. initial components at which purified least amount impurities. particle size was 50–80 nm synthesis, 30–50