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HomeMaterials Science ForumMaterials Science Forum Vols. 809-810Effect of Additives on the Formation of SmCo...

Effect of Additives on the Formation of SmCo Magnetic Nanoparticles by Chemical Synthesis

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Abstract:

Monodispersed magnetic SmCo nanoparticles have been prepared by polyol synthesis using non-toxic inorganic precursors (nitrates). The effect of the additives of NaOH, HNO₃, CH₃COOH and poly vinyl pyrrolidone (PVP) on the formation of SmCo nanoparticles is studied in this paper. The results indicate that base solution can boost the reduction of Co while acid solution is helpful for the formation of SmCo due to decreasing the reduction velocity of Co. CH₃COOH is appropriate additive for the synthesis of SmCo nanoparticles, but more addition of CH₃COOH will result in the emergence of CoC₂ phase and decrease the coercivity of the resultants. The additive of PVP not only is a dispersing agent, but can prevent them from oxidating during preparation process. The SmCo nanoparticles with a size of 5-8 nm have the ferromagnetic properties of high coercivity (>1000 Oe).

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2014 China Functional Materials Technology and Industry Forum

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Periodical:

Materials Science Forum (Volumes 809-810)

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9-16

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https://doi.org/10.4028/www.scientific.net/MSF.809-810.9

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Online since:

December 2014

Authors:

Jian Jun Tian*

Keywords:

Coercivity, Magnetic Materials, Nanoparticle, SmCo

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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