Issue 2, 2004

Microstructures and magnetic properties of boron nitride- and carbon-coated iron nanoparticles synthesized by a solid phase reaction

Abstract

A promising technique to synthesize iron nanoparticles with boron nitride (BN) and carbon (C) nanocoatings was developed. Mixtures of α-Fe2O3 and boron or carbon powders were employed as starting materials and were annealed at temperatures above 1273 K in a nitrogen atmosphere. Products were mainly composed of α-Fe and hexagonal BN or graphite carbon without hematite, which was confirmed by X-ray diffraction. High-resolution transmission electron microscope observation revealed that BN and C nanocapsules with iron nanoparticles of ca. 300 nm in diameter were formed, and they exhibited soft magnetic properties from magnetization measurements. In addition, multi-walled BN and C nanotubes with diameters of a few hundred nanometers were produced by the present method.

Graphical abstract: Microstructures and magnetic properties of boron nitride- and carbon-coated iron nanoparticles synthesized by a solid phase reaction

Article information

Article type
Paper
Submitted
08 Sep 2003
Accepted
27 Oct 2003
First published
20 Nov 2003

J. Mater. Chem., 2004,14, 253-257

Microstructures and magnetic properties of boron nitride- and carbon-coated iron nanoparticles synthesized by a solid phase reaction

H. Tokoro, S. Fujii and T. Oku, J. Mater. Chem., 2004, 14, 253 DOI: 10.1039/B310864C

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