Mi. Baraton et al., FTIR STUDY OF A NANOSTRUCTURED ALUMINUM NITRIDE POWDER SURFACE - DETERMINATION OF THE ACIDIC BASIC SITES BY CO, CO2 AND ACETIC-ACID ADSORPTIONS/, Nanostructured materials, 8(4), 1997, pp. 435-445
The surface contamination of nanosized powders is a critical factor in
fluencing the overall material properties. For non-oxide ceramics, hyd
rolysis leads to a surface reactivity close to that of the correspondi
ng oxide. However, the surface behavior of these non-oxide nanostructu
red ceramics often results in chemical specificities. A thorough inves
tigation of the surface composition and reactivity of a nanostructured
aluminum nitride powder already started in previous papers, is pursue
d here. The Fourier transform infrared spectrometric study of carbon m
onoxide, carbon dioxide and acetic acid adsorptions on the activated a
luminum nitride surface revealed the presence of Bronsted and Lewis ba
sic sites. Furthermore, the aluminum nitride surface chemical specific
ity with respect to the gamma-alumina surface was demonstrated. (C) 19
97 Acta Metallurgica Inc.