Infrared spectra of sodium phosphate glasses

Abstract Infrared absorption spectra of sodium phosphate glasses, Na 2 O=30–50 mol%, have been studied in the region of 400–2000 cm −1 . Spectra were analyzed to determine the relative intensity of the IR bands responsible for the different phosphate units. Spectral analyses has shown that the substitution of P 2 O 5 by Na 2 O influences the intermediate range order of the glass matrix. Increasing Na 2 O content leads to a gradual degradation of the phosphate ring type structures, with consequent depolymerization causing compaction of the glass matrix. Analyses of IR spectra illustrates the reorganization effects of Na 2 O in the phosphate matrix.

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