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Synthesis of boron nitride nanolayers encapsulating iron fine particles and boron nitride nanotubes

Published online by Cambridge University Press:  01 February 2011

Hisato Tokoro ,
Shigeo Fujii ,
Takeo Oku  and
Shunsuke Muto
Hisato Tokoro
Affiliation:
Hitachi Metals, Ltd., Advanced Electronics Research Laboratory, Mikajiri 5200, Kumagaya, Saitama, 360–0843, Japan
Shigeo Fujii
Affiliation:
Hitachi Metals, Ltd., Advanced Electronics Research Laboratory, Mikajiri 5200, Kumagaya, Saitama, 360–0843, Japan
Takeo Oku
Affiliation:
Osaka University, Nanoscience and Nanotechnology Center, Institute of Scientific and Industrial Research, Mihogaoka 8–1, Ibaraki, Osaka, 567–0047, Japan
Shunsuke Muto
Affiliation:
Nagoya University, Department of Nuclear Engineering Graduate School of Engineering, Furo-Cho, Chikusa-ku, Nagoya, 464–8603, Japan
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Abstract

Boron nitride (BN) nanolayers encapsulating iron (Fe) fine particles have been synthesized by annealing mixtures of hematite (α-Fe2O3) and boron powders at 1373 K for 2 hours in nitrogen atmosphere. The Fe particles had an average diameter of ∼300 nm with BN nanolayers coating of ∼10 nm. The α-Fe2O3 was transformed into Fe and then Fe-B on a process of annealing. The Fe-B was decomposed into Fe and BN, and consequently Fe particles coated with BN nanolayers were synthesized. They showed soft magnetic properties with coercivity of 1.5 kA/m. The BN nanolayers encapsulation was effective on improving oxidation resistance. BN nanotubes with diameter of ∼100 nm were also synthesized as a resultant product by this method.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 789 , 2003 , N3.34
Copyright
Copyright © Materials Research Society 2004

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