KARAKTERISASI BESARAN MAGNET PERMANEN DARI HASIL CAMPURAN NdFeB DAN SERBUK EPOXY RESIN

Abstract

The bonded permanent magnet Nd 2 Fe 14 B has been made using raw materials Nd-Fe-B powder mixed withadhesive epoxy resin . Permanent magnets can be applied as a component of small DC motors and car parts.NdFeB composition variation on epoxy resins are made with the ratio of 93 : 7, 95 : 5, 90 : 10, 80 : 20, 70 : 30, 60: 40, 50 : 50, (% weight). Raw material NdFeB was made from the mixture of Nd, Fe and B with atomic ratio 2 :14 : 1 by using mechanical alloying technique. The blend of NdFeB and epoxy resin has been done in the vacuumbox . Sample test was prepared by compression with hydraulic press pressure 100kg/cm 2 within 2 minutes. Heattreatment in the oven with a temperature of 180 O C for 4 hours. The sample test was made in cylindrical shape witha diameter of 2-3 cm and thickness of 0.4 to 0.9 cm. The measurement of density vs. Histerisis has been recorded.The results show that the bonded NdFeB permanent magnets achieve optimum conditions in comparison NdFeB97% and 3% epoxy with the density = 4.49 g/cm3 and remanansi (Br) = 5.32 kG, HcJ = 7.936 kOe and (BH) max= 5.75 MGOe.