Browsing by Author "Gurning, Devi Tamaria"

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    PENGARUH DOPING TEMBAGA TERHADAP NILAI SUSEPTIBILITAS MAGNETIK DAN KOMPOSISI NANOPARTIKEL α-Fe2O3 (HEMATITE) DARI PASIR ALAM LOGAS
    (Elfitra, 2022-02) Gurning, Devi Tamaria; Erwin, Erwin
    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.
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    PENGARUH DOPING TEMBAGA TERHADAP NILAI SUSEPTIBILITAS MAGNETIK DAN KOMPOSISI NANOPARTIKEL α-Fe2O3 (HEMATITE) DARI PASIR ALAM LOGAS
    (Elfitra, 2022-03) Gurning, Devi Tamaria; Erwin, Erwin
    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.