Abstract
X-ray photoemission spectroscopy (XPS) studies have been undertaken on a series of soda aluminosilicate glasses with Aℓ/Na ratio varying from 0 to 1.33 to test the current structural models for these glasses. By monitoring the amount of bridging and nonbridging oxygens as a function of Aℓ/Na ratio, XPS results indicate that the amount of nonbridging oxygens in the glass structure is directly proportional to the sodium concentration and independent of the Aℓ/Na ratio, thus contradicting the expectation of all the proposed structural models. Changes in the charge distribution of the aluminosilicate glass network and the sodium ions are clearly evident in the XPS results.
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