Riyanto, Agus (2019) Preparasi dan Karakteristik Fisis Nanopartikel Magnetit (Fe3O4). Jurnal Fisika Flux, 16 (1). pp. 35-41. ISSN 2514-1713
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Abstract
−This study aims to identify the effect of preparation temperature on microstructure and magnetic properties of magnetite nanoparticles prepared from FeSO4.7H2O and FeCl3.6H2O by using the coprecipitation method without organic solvent and surfactant. Precursors were prepared at 30 oC, 60 oC, and 90 oC under atmospheric pressure. Microstructure and diameter distribution of magnetite nanoparticles were analyzed by using XRD, FTIR, TEM, and ImageJ software, while the magnetic properties were analyzed using VSM. The identification result shows that the magnetite phase was formed on all samples with a polycrystalline structure. The increasing of preparation temperature was followed by an increase in the diameter of grains and the oxidation rate of magnetite phase into maghemite (γ-Fe2O3). The superparamagnetic properties almost can be observed mainly in the sample prepared at 30 oC, where the magnitude of remanent and coercivity is 3.39 emu/g and 23.93 Oe, respectively. The magnitude of remanent and coercivity increases as preparation temperature increases and superparamagnetic effect decrease.
| Item Type: | Article |
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| Subjects: | Q Science > QC Physics |
| Divisions: | Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA) > Prodi Fisika |
| Depositing User: | Agus Riyanto |
| Date Deposited: | 09 May 2019 01:28 |
| Last Modified: | 09 May 2019 01:28 |
| URI: | http://repository.lppm.unila.ac.id/id/eprint/11613 |
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