Aluminum nitride by microwave-assisted synthesis: Effect of added ammonium chloride

Hexagonal aluminum nitride (AlN) crystals were synthesized by microwave method with ammonium chloride used as an additive. Starting mixtures consisted of Al powder, NH 4 Cl, and urea as a fuel taken in a 1: 3: 1 ratio. The microwave oven operated at 630 W, the synthesis time was 10, 30, 60, and 120...

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Veröffentlicht in:	International journal of self-propagating high-temperature synthesis 2010-09, Vol.19 (3), p.214-220
Hauptverfasser:	Angappan, S., Rajalakshmi, A., Arockia Hedwig Leena, V., Berchmans, L. J., Visuvasam, A.
Format:	Artikel
Sprache:	eng
Schlagworte:	Chemistry and Materials Science Materials Science
Online-Zugang:	Volltext
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Zusammenfassung:	Hexagonal aluminum nitride (AlN) crystals were synthesized by microwave method with ammonium chloride used as an additive. Starting mixtures consisted of Al powder, NH 4 Cl, and urea as a fuel taken in a 1: 3: 1 ratio. The microwave oven operated at 630 W, the synthesis time was 10, 30, 60, and 120 min. The results showed that the pure AlN powder with regular and fine grains could be obtained in 30 min. The synthesized powders were characterized by TGA/DTA, XRD, FT-IR, UV-VIS, SEM, and TEM.
ISSN:	1061-3862 1934-788X
DOI:	10.3103/S1061386210030088