Pengaruh Aditif Ferro Boron (FeB) terhadap Karakteristik Serbuk Hematit (?-Fe₂O₃)

Abstrak

The study about effect of ferro boron (FeB) additive towards characteristic of hematite (?-Fe₂O₃) powder has been done. The powders of FeB and?-Fe₂O₃ was milled with dry milling method using Planetary Ball Mill (PBM) for 12 hours. Variation of FeB compositions are 4 and 8 wt.%. The milled powder was calcinedat temperatures of 900, 1000 and 1100^oC. The characterization of the powders was performed by Particle Size Analyzer (PSA), true density, X-Ray Diffraction (XRD) and Vibrating Sample Magnetometer (VSM). The results effect of additives FeB showed an increasing of particle size which related to decrease of true density of sample 8 wt.% composition with a value 2.80 ?m and 2.47 g / cm³. Respectively the XRD characterization of sample with 8 wt.%composition with the calcination temperature of 1000 and 1100 C showed that iron boride (Fe₂B)phase was formed. Maghemite (?-Fe₂O₃) and magnetite (Fe₃O₄) was formed during calcination for non-additive sample. The VSM characterization showing the effect of the calcination temperatureare increasing the magnetic properties and the addition of FeB tends to lower the magnetic properties within samples before and aftercalcined.