Magnetic properties and morphology of natural sand has been carried out in Logas Village, Kuantan Singingi Regency have been determined. Iron sand samples were processed using iron sand separator (ISS) prior to ball milling for separating between magnetic and non magnetic particles. The product of ISS was milled for 90 hours using ball milling first step method with milling ball size of 1.5 cm. Themagnetic and non-magnetic particles of ball milling products were separated using Neodymium Iron Boron (NdFeB) magnet. The product of ball milling first step then was milled for another 30 hours with milling ball size of 0.5 cm and 0.7 cm. The susceptibility and mass susceptibility were determined based on magnetic induction of a selenoid measured using Probe Magnetic Pasco PS-2162. The composition of Logas natural sand was measured using x-ray fluorescence spectroscopy (XRF). The morphology of the magnetic particles are determined using scanning electron microscope (SEM). The results showed that the particle size of natural sand for 90 hours + 30 hours milling displays the particle sizes from 100 µm to 800 µm. As for the particle size of the samples synthesized with 90 hours + 30 hours for 0.7 cm milling ball size, the particles are almost evenly distributed, which is about 5 µm to 100 µm. The content of Fe and Ti in the sample has increased while for Si has decreased. Mass susceptibility increases with increasing ball milling time and ball milling size.
Doping of metal ions in magnetic iron oxide particles can improve its performance and lead to its new technological and industrial applications. Magnetic iron oxide particles of undoped and cobalt doped were synthesized from natural sand of Logas District Kuansing Regency by ball milling method. The structural properties and the morphology of the magnetic iron oxide F e2O3 particles were analyzed using X-Ray Diffractometer (XRD) and scanning electron microscope (SEM). The X-ray diffractometric study showed that X-ray diffraction (XRD) peaks shift to slightly higher angles as compared to those of undoped magnetic iron oxide particles. This shift is due to relatively smaller ionic radius of cobalt as compared to those for iron. Moreover, peaks corresponding to cobalt oxide or metal cobalt could not be observed in the diffraction pattern. Some other diffraction peaks from other crystalline forms such as silicon (Si) and titanium (Ti) were observed.
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