Abstract:
The effect of copper doping on the magnetic susceptibility and elemental
composition of iron oxide nanoparticles from Logas natural sand, Kuantan
Singingi Regency, Riau Province prepared using ball milling has been studied.
Prior to ball milling process, this natural sand was processed using Iron Sand
Separator (ISS) and Neodynium Iron Boron (NdFeB) magnets in order to separate
between iron and non iron oxide particles. This product is called the NdFeB
product. The NdFeB product was milled using ball milling for 3 stages. The
product of each stage was processed by NdFeB. The last product of ball milling is
called BM 3. The BM 3 product was divided into 5 parts with equal weight (wt)
and then each of them was doped using copper (Cu) with concentration of 0
wt.%, 5 wt.%, 10 wt.%, 15 wt.% and 20 wt.% using ball milling for 20 hours and
the products are called BM4A, BM4B, BM4C, BM4D and BM4E, respectively.
The magnetic susceptibility of the BM4 products was measured using Pasco
magnetic probe. The resulting magnetic susceptibility of the samples decreases
with increasing copper concentration. Elemental composition of the samples was
determined using X-Ray Fluorescence (XRF). The results showed that the amount
of copper element increased with increasing doping concentration from 0.008%
before doping (0 wt% Cu) to 11.684% after doping (5 wt% Cu), while other
elements such as Si, Ti, Al, Ca decreases.
