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Effect of starting powder morphology on AlN prepared by combustion reaction

Published online by Cambridge University Press:  01 March 2005

Jaeryeong Lee ,
Ikkyu Lee ,
Dongjin Kim ,
Jonggwan Ahn  and
Hunsaeng Chung
Jaeryeong Lee*
Affiliation:
Korea Institute of Geoscience and Mineral Resources, Yuseong-gu, Daejeon 305-350, Korea
Ikkyu Lee
Affiliation:
Korea Institute of Geoscience and Mineral Resources, Yuseong-gu, Daejeon 305-350, Korea
Dongjin Kim
Affiliation:
Korea Institute of Geoscience and Mineral Resources, Yuseong-gu, Daejeon 305-350, Korea
Jonggwan Ahn
Affiliation:
Korea Institute of Geoscience and Mineral Resources, Yuseong-gu, Daejeon 305-350, Korea
Hunsaeng Chung
Affiliation:
Korea Institute of Geoscience and Mineral Resources, Yuseong-gu, Daejeon 305-350, Korea
*
a)Address all correspondence to this author. e-mail: jrlee@kigam.re.kr
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Abstract

The particle size and shape effects of starting raw powders on the synthesis of aluminum nitride by combustion reaction technique were investigated with four sizes of AlN powder as diluent and two shapes of Al powder as reactant. It was found that the structure of beds of starting particles significantly affected the pore channels for nitrogen gas accessibility into a mixture compact and the passages for combustion wave propagation through particles, resulting in changes of AlN product morphology and purity. Through control of the starting particle size and shape, high-purity (over 98%) AlN products several tens of microns in size were synthesized.

Keywords

MorphologySelf-propagating high-temperature synthesis (SHS)
Type
Articles
Information
Journal of Materials Research , Volume 20 , Issue 3 , March 2005 , pp. 659 - 665
Copyright
Copyright © Materials Research Society 2005

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References

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