Characterization of some glasses in the system SiO2, Na2O.RO by infrared spectroscopy

The structural groups arrangement of some glasses obtained in the system SiO2. Na2O.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 SiO2, Na2O, B2O3 with variable B2O3 content are studied. The prepared glass samples were examined by infrared spectroscopy in the range 4000-400cm(-1) by the KBr disc technique. Experimental data reveal the appearance of extended infrared absorption spectra. The mid-absorption bands (500-2000cm(-1)) are related to characteristic structural building units such as SiO4, BO3 and BO4 groups. Also the corrosion behavior of the glasses was studied by subjecting selected grains of the samples to the action of 0.1 M HCl solution or 0.1 M NaOH solution at 100 degreesC for I h. The results are discussed taking into consideration the current views on the corrosion mechanism of silicate glasses. (C) 2002 Elsevier Science B.V. All fights reserved.