Open AccessSynthesis of pure hexagonal phase aluminium nitride foam
Author(s) -
Lü Hui-Min,
Shi Zhen-Hai,
Guangde Chen
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.6403
Subject(s) - materials science , scanning electron microscope , absorption (acoustics) , nitride , aluminium , autoclave , diffraction , phase (matter) , hexagonal phase , absorption spectroscopy , hexagonal crystal system , aluminium nitride , chemical engineering , metal foam , composite material , crystallography , optics , layer (electronics) , metallurgy , chemistry , physics , organic chemistry , engineering
In a stainless steel autoclave of 15 ml capacity, pure hexagonal aluminum nitride h-AlN foam has been synthesized by direct reaction of AlCl3 with NaN3 in non-solvent system at 650 ℃ for 3h. The scanning electron microscopy SEM shows that the obtained foam material has characteristic sponge-like morphology. The results of X-ray diffraction XRD indicate that the AlN foam has a pure hexagonal structure. The absorption spectra at various temperatures indicate that there is a relatively strong absorption peak at about 202 nm. The infrared absorption spectrum shows that the foam has two absorption peaks, centered at 1381 cm-1 and 730 cm-1 respectively. In addition, a possible synthesis mechanism for h-AlN foam is discussed.