Characterization of some glasses in the system SiO_2, Na_2O·RO by infrared spectroscopy

摘要

The structural groups arrangement of some glasses obtained in the system SiO_2. Na_2O·RO (where R is a divalent oxide: CaO, SrO, BaO, MgO, ZnO), examined by infrared absorption spectroscopy are reported. Also, some glasses of the system SiO_2, Na_2O, B_2O_3 with variable B_2O_3 content are studied. The prepared glass samples were examined by infrared spectroscopy in the range 4000―400 cm~(―1) by the KBr disc technique. Experimental data reveal the appearance of extended infrared absorption spectra. The mid-absorption bands (500―2000 cm~(―1)) are related to characteristic structural building units such as SiO_4, BO_3 and BO_4 groups. Also the corrosion behavior of the glasses was studied by subjecting selected grains of the samples to the action of 0.1 M HC1 solution or 0.1 M NaOH solution at 100℃ for 1 h. The results are discussed taking into consideration the current views on the corrosion mechanism of silicate glasses.