Pengaruh Penambahan Polyethylene Glycol (PEG) Terhadap Sifat Magnetik (γ-Fe2O3) Yang Disintesis Dari Magnetit Batuan Besi (Fe3O4)
DOI:
https://doi.org/10.25077/jif.9.2.103-109.2017Abstract
Telah dilakukan sintesis magnetit dari biji besi Nagari Surian Kecamatan Pantai Cermin Kabupaten Solok Sumatera Barat dengan metode kopresipitasi. Selanjutnya dari magnetit tersebut disintesis maghemit tanpa dan dengan penambahan PEG melalui oksidasi pada temperatur 400 oC selama 3 jam. Variasi PEG yang digunakan yaitu sampel tanpa penambahan PEG, sampel dengan penambahan PEG-2000, PEG-4000, dan PEG-6000. Maghemit yang dihasilkan dikarakterisasi sifat magnetik menggunakan Vibrating Sample magnetometer (VSM). Karakterisasi sifat magnetik menggunakan VSM menghasilkan nilai koersivitas berturut-turut yaitu 250 Oe, 193 Oe, 203 Oe, 178 Oe. Terlihat bahwa penambahan PEG mengurangi nilai koersivitas maghemit.
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Kata kunci: magnetit, maghemit, PEG, VSM, koersivitas
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