Pembuatan Nanosilikon dari Pasir Alam secara Magnesiotermik dengan Penambahan Kalium Klorida.

Abstract

The research of synthesis nanosilicon from natural sand by magnesiothermic method with the additional of potassium chloride with ultrasonic. The Sand is initially extracted with HCl and H2SO4 and analyzed XRD. Then silica reduced to silicon by magnesiotermic method with ratio SiO2 : Mg was 1:2, at temperature of 800°C for 6 hours. Then the result of reduction is purified by two methods. The first method is to usemakuabides, HCl 2N, mixture of HCl 2N and CH3COOH 25% and mixtures CH3COOH 25% with HF 4,8% with heating at 80°C for 3 hours. And the second method is to icrease the concentration of HCl 5N, and HF 10% without heating. The purification results of the two methods were analyzed using an analysis XRD and obtained purification results from the first method 40,4% with particle size of 42,993 nm – 58,567 nm and from second method 64,7% with particle size of 42,993 nm – 58,567 nm.