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Formation of nanocrystalline h-AlN during mechanochemical decomposition of melamine in the presence of metallic aluminum

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Bibliographic Details
Title: Formation of nanocrystalline h-AlN during mechanochemical decomposition of melamine in the presence of metallic aluminum
Authors: Rounaghi, S.A.1 s.a.rounaghi@gmail.com, Kiani Rashid, A.R.1, Eshghi, H.2 heshghi@ferdowsi.um.ac.ir, Vahdati Khaki, J.1
Source: Journal of Solid State Chemistry. Jun2012, p8-11. 4p.
Subjects: Aluminum nitride, Nanocrystals, Mechanical chemistry, Chemical decomposition, Melamine, Solid state chemistry, Mechanical alloying
Abstract: Abstract: Decomposition of melamine was studied by solid state reaction of melamine and aluminum powders during high energy ball-milling. The milling procedure performed for both pure melamine and melamine/Al mixed powders as the starting materials for various times up to 48h under ambient atmosphere. The products were characterized by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The results revealed that Al causes melamine deammoniation at the first stages of milling and further milling process leads to the s-triazine ring degradation while nano-crystallite hexagonal aluminum nitride (h-AlN) was the main solid product. Comparison to milling process, the possibility of the reaction of melamine with Al was also investigated by thermal treatment method using differential scanning calorimeter (DSC) and thermo gravimetric analyzer (TGA). Melamine decomposition occurred by thermal treatment in the range of 270–370°C, but no reaction between melamine and aluminum was observed. [Copyright &y& Elsevier]
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Database: Engineering Source
Description
Abstract:Abstract: Decomposition of melamine was studied by solid state reaction of melamine and aluminum powders during high energy ball-milling. The milling procedure performed for both pure melamine and melamine/Al mixed powders as the starting materials for various times up to 48h under ambient atmosphere. The products were characterized by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The results revealed that Al causes melamine deammoniation at the first stages of milling and further milling process leads to the s-triazine ring degradation while nano-crystallite hexagonal aluminum nitride (h-AlN) was the main solid product. Comparison to milling process, the possibility of the reaction of melamine with Al was also investigated by thermal treatment method using differential scanning calorimeter (DSC) and thermo gravimetric analyzer (TGA). Melamine decomposition occurred by thermal treatment in the range of 270–370°C, but no reaction between melamine and aluminum was observed. [Copyright &y& Elsevier]
ISSN:00224596
DOI:10.1016/j.jssc.2012.01.005