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Morphology of Nanometric Boron Nitride Powders Produced by Laser Pyrolysis

Published online by Cambridge University Press:  15 February 2011

F. Willaime ,
L. Boulanger  and
M. Cauchetier
F. Willaime
Affiliation:
Section de Recherches de Métallurgie Physique - Département d'Etude du Comportement des Matériaux - Direction des Technologies Avancées, Centre d'Etudes de Saclay, F-91191 Gif-sur- Yvette, France
L. Boulanger
Affiliation:
Section de Recherches de Métallurgie Physique - Département d'Etude du Comportement des Matériaux - Direction des Technologies Avancées, Centre d'Etudes de Saclay, F-91191 Gif-sur- Yvette, France
M. Cauchetier
Affiliation:
Service des Photons, Atomes et Molécules - Département de Recherches sur r'Etat Condensé, les Atomes et les Molécules - Direction des Sciences de la Matière, Centre d'Etudes de Saclay, F 91191 Gif-sur-Yvette, France
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Abstract

Ultrafine boron nitride powders were synthesized by laser driven reactions in BC13-NH3 mixtures. The structure and morphology of the graphitic nanoparticles generated in this process were investigated by high-resolution electron microscopy. Polyhedral concentric shells (ranging in size from 30 nm to more than 100 nm) are a major constituent of the as-pyrolyzed powder. This onion-like configuration is very similar to that observed in carbon materials. After heat treatment at 1650°C under nitrogen atmosphere, plate-like particles with a few perfectly flat graphitic sheets (10 to 50 layer thick, 50 nm in diameter) are formed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 359: Symposium G – Science and Technology of Fullerene Materials , 1994 , 53
Copyright
Copyright © Materials Research Society 1995

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