Characterization of Modified and Polymer Coated Alumina Surfaces by Infrared Spectroscopy

Table 3

DRIFT bands that are characterizing alkali metal treated alumina samples.

Bands cm^−1	Assignment	Absorbance
		AlNa	AlCNa
3566	The hydroxyl groups adsorbed on the surface (for free Al2O3)	0.38	0.31
1636	Bending of the H–O–H bonds	0.26	0.18
1053	Cluster of Al^3+ and O^2− ions on the surface of alumina	0.36	0.31
856	Al–O stretching	0.47	0.59
727		0.5	0.6
653		0.5	0.6