Diffuse reflectance FT-IR spectroscopic study of interactions of alpha-Al2O3/molten alkali nitrate coexisting systems.

The diffuse reflectance spectra of alpha-Al(2)O(3)/molten MNO(3) (M=K(+), Li(+)) coexisting systems have been measured for the investigation of the physicochemical properties of molten nitrate at the interface of aluminum oxide. In the region of overtone and combination modes from 3000 to 1700 cm(-1), the absorption band nu(3)+nu(4) decreases with increasing specific surface area of alpha-Al(2)O(3) powder for the potassium mixtures. Gaussian resolution of nu(3)+nu(4) also exhibits changes in band positions of components with the variation in the alumina specific surface area and the nitrate melt content.