Internal friction of NaPO3 glasses containing water

Delbert E. Day, J.M. Stevels

    Research output: Contribution to journalArticleAcademicpeer-review

    6 Citations (Scopus)


    The internal friction of sodium metaphosphate glasses containing from 0.016 to 0.330 wt% water has been investigated. Weight loss and infrared absorption measurements were used to determine the water content. Of the two internal friction peaks observed between -100°C and ∼250°C, the second peak occurring above room temperature has a pronounced dependence upon the water content; increasing water content causing the activation energy to decrease as the peak increased in size. A mechanism consisting of the cooperative motion of sodium ions and protons has been proposed for this peak. It is concluded that the second peak in the NaPO3 glasses and the similar peak in alkali silicate glasses is not associated with the movement of the non-bridging oxygen ions.

    Original languageEnglish
    Pages (from-to)459-470
    Number of pages12
    JournalJournal of Non-Crystalline Solids
    Issue number5
    Publication statusPublished - Mar 1973


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