Fabrication and Characterization of CoFe2O4/CoFe2/SiO2 Nanocomposite Particles

Tran Thi Viet Nga

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Published Oct 6, 2020
DOI: https://doi.org/10.25073/2588-1124/vnumap.4481

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NGA, Tran Thi Viet. Fabrication and Characterization of CoFe2O4/CoFe2/SiO2 Nanocomposite Particles. VNU Journal of Science: Mathematics - Physics, [S.l.], v. 36, n. 4, oct. 2020. ISSN 2588-1124. Available at: <https://js.vnu.edu.vn/MaP/article/view/4481>. Date accessed: 22 dec. 2024. doi: https://doi.org/10.25073/2588-1124/vnumap.4481.
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Issue
Vol 36 No 4
Section
Original Articles

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Abstract

The CoFe2O4/CoFe2/SiO2 nanocomposite particles were synthesized using a sol- gel method and calcination in hydrogen. The magnetic properties and structure of nanocomposite particles calcinated at 600 oC and 900 oC in range of calcination time from 1 h to 4 h were investigated. The phase composition, surface morphology and magnetic properties of the nanocomposites were investigated using X-ray powder diffraction, scanning electron microscopy and vibrating sample magnetometer. The XRD patterns indicate the existence of both CoFe2O4 and CoFe2 phases in the nanocomposite after reducing at 600 oC for 2 h and 3 h. The single phase CoFe2 was obtained after reducing at 900 oC. The average particles size was evenly distributed in the range of 20 nm to 120 nm. The magnetization increases significantly with increasing of reduction temperature.

Keywords: Sol-gel synthesis, nanocomposite, core- shell, exchange coupled

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