Analisa Komposisi Dan Ukuran Partikel Oksida Besi Di Preparasi Ball Milling D…

ABSTARCT The value of magnetic susceptibility and variation of composition and size of iron oxide particles from natural sand collected from Rokan River Riau. Before going through the ball milling process, the magnetic and non-magnetic particles of the sample were separated using an Iron Sand Separator and a Neodynium Iron Boron (NdFeb) magnet. The product of NdFeB as milled for 80 hours, name…