Optimasi Proses Pembuatan Hard-Magnetic Material Berbasis Bafe12o19 dengan Aditif Femn

Abstract

Has been done manufacturing of the magnet permanent Barium Hexaferrite (BaFe12O19) with the addition of additives Ferromanganese (FeMn) variations in composition 3 and 7 (wt%) using the mechanical alloying method. Powder of BaFe12O19 and FeMn mixed using HEM for 15 minutes (dry milling). Samples were pressed with pressure 40kgf/cm2 using a magnetic field press in 3.6 kG magnetic field. Samples were sintered using the High Temperature Furnace at 1100, 1150, 1200 and 1250oC for 2 hours. Samples were characterized on physical properties (bulk density, porosity), the microstructure analysis using XRD and magnetic properties using the VSM. It was found that the additive 3 wt. % FeMn with 1200oC as the sintering temperature (2 hours) has the highest magnetic and physical properties where the bulk density at 4.81 g/cm3, porosity at 20%, the saturation at 63.49 emu/g, remanence at 31.45 emu/g, coercivity at 3 kOe, and BHmax = 630 kGOe.