Preparation and Surface Modification of Fe3O4 Nano-Magnetic Powders

Zhi Li Zhang; Dan Shi; De Cai Li; Han Qi; Ya Fei Shangguan

doi:10.4028/www.scientific.net/AMR.412.150

Paper Titles

Properties of SnO-B₂O₃-SiO₂ Lead-Free Glass Powder
p.133

Characterization of Ultrafine Glassy Powder for Al-Si-Ca-P-O-F Polynary System by Sol-Gel Method
p.138

Bismuth Ferrite Nanopowders Prepared by Sol-Gel
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Technological Conditions and Magnetic Properties of Y-Type Hexaferrite Prepared by Chemical Co-Precipitation Method
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Preparation and Surface Modification of Fe₃O₄Nano-Magnetic Powders
p.150

Experimental Study of Property of Magnetic Nanoparticle Prepared in Different Temperatures
p.155

Synthesis, Characterization and the Growth Formation of Spindle-Like CdS Nanostructures
p.159

Hydrothermal Synthesis, Photoluminescence Property and Superhydrophobicity of In(OH)₃
p.163

Preparing Fluorhydroxyapatite by Aqueous Precipitation Method
p.167

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Preparation and Surface Modification of Fe₃O₄Nano-Magnetic Powders

Abstract:

Because of aggregation and low chemical stability of nanomagnetic particles, we use Sol-Gel method as surface modification in this paper to improve the disperse ability and the chemical stability of Fe₃O₄ particles. At first, Fe₃O₄ were prepared by chemical-precipitation method. Then, the Sol-Gel method was used to modify the surface of the particles. Core-shell structural Fe₃O₄@ S iO₂ composite magnetic particles were prepared by hydrolysis and condensation of tetraethyl orthosilicate using Fe₃O₄nanomagnetic particles as seeds. XRD,VSM were applied to characterize the composite magnetic particles. The effects of rotational speed and the quantity of TEOS on the performance of Fe₃O₄@ S iO₂ composite magnetic particles were investigated.