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Combustion synthesis of AlN with melamine as an additive

Published online by Cambridge University Press:  01 March 2006

Gunchoo Shim ,
Je-Shin Park  and
Sung-Wook Cho
Gunchoo Shim*
Affiliation:
Korea Institute of Geoscience and Mineral Resources, Yusung-gu, Daejeon 305-350, Republic of Korea
Je-Shin Park
Affiliation:
Korea Institute of Geoscience and Mineral Resources, Yusung-gu, Daejeon 305-350, Republic of Korea
Sung-Wook Cho
Affiliation:
Korea Institute of Geoscience and Mineral Resources, Yusung-gu, Daejeon 305-350, Republic of Korea
*
a) Address all correspondence to this author. e-mail: gshim@kigam.re.kr
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Abstract

Melamine (C3H6N6) was used as an additive for synthesizing aluminum nitride by combustion synthesis. It was found that at least 0.1 M of melamine addition to 1 M of aluminum and 0.8 MPa of nitrogen pressure were necessary to initiate a stable reaction. In addition to melamine, however, use of aluminum nitride as a diluent and application of forced nitrogen flow yielded better results. Analyzing the reaction temperatures, reaction rates, nitrogen contents, x-ray diffraction patterns, and scanning electron microscopy photographs, the optimum conditions for synthesizing AlN were established: (i) reactants were 90 wt% (1 M Al + 0.1 M melamine) + 10 wt% AlN diluent, (ii) chamber pressure was 0.9 MPa, and (iii) nitrogen flow rate was 15 l/min. Under these conditions, aluminum nitride with the stoichiometric nitrogen content of 34 wt% could be obtained.

Keywords

AdditivesCeramicCombustion synthesis
Type
Articles
Information
Journal of Materials Research , Volume 21 , Issue 3 , March 2006 , pp. 747 - 753
Copyright
Copyright © Materials Research Society 2006

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