KARAKTERISASI NANOSTRUKTUR KARBON DARI GRAFIT HASIL MILLING[Characterization of Nanostructured Carbon from Graphite as Milling Product]

Abstract

Characterization of nanostructured carbon from graphite as milling product of high energy milling (HEM) technique was carried out. Nanostructured carbon was prepared by milling process against the graphite powder with various of milling time between 25 hours up to 100 hours. A milled graphite powder was then identified their phase by using phase identification with x-ray diffractometer methods, formed particle size was measured by particle size analyzer (PSA) and the detail phase including the tophology and measurement of particle size were observed with transmission electron microscopy (TEM) methods. The result of identification phase of the graphite powder milling results showed that the intensity of diffraction peaks which appear only diffraction peaks for carbon C(002) C(004) and C(110), while for other atoms do not identified. This indicates that the graphite structure is still dominated by the hexagonal phase. The intensity of diffraction peaks is loweralong with increasing milling time. PSA analysis result shows the formation of carbon nanostructure as the result of milling process, which the carbon particle size decreases with the increasing of milling time; from 540 nm (25 hours) to 190 nm (75 hours). TEM analysis result shows the existence of long small fiber with the size of 10 – 75 nm and the length of 20 – 200 nm. This shows that the result of collisions between particles of graphitepowder with milling balls during milling process, resulting in the destruction of the graphite particles until nano size and also in the forming of carbon fiber.