Pembuatan Nanosilikon dari Pasir Alam Kecamatan Tanjung Tiram Kabupaten Asahan secara Magnesiotermik dengan Penambahan Natrium Klorida sebagai Penyerap Kalor

Abstract

The research of synthesis nanosilicon from natural sand from District Tanjung Tiram Regency of Asahan by magnesiothermic method with sodium chloride as calor absorber have been done. The adding of natrium chloride aims to absorb the excess heat that was produced by magnesium and excess heat that was produced by excess heating time in order to prevent the nanosilicon’s particle from melting and formed aglomeration, so the nanosilicon that have small particle could be obtained. The sand that would be used were pureed first and isolated the silica from it, after that, the silica were ultrasonicated with NaCl with 1:10 molar ratio. Silica that have been obtained were reducted twice by magnesium with 1:2 molar ratio. First, the silica were reducted at 800°C for 6 hours and the second the silica were reducted at 800°C for 7 hours. Product of nanosilicon were characterized by diffractometer and transmission electron microscop (TEM). The result showed that the product nanosilicon for 6 hours have purity 49,4% and its particle size was 42,585 nm – 61,064 nm and from the TEM we got that the particle size of nanosilicon were uneven, while the nanosilicon for 7 hours have purity 29% and its particle size was 47,180 nm – 62,585 nm.