Mechanical Damping Spectrum for Mixed‐Alkali R2 O·Al2 O3·6SiO2 Glasses
- 1 November 1969
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 52 (11) , 571-574
- https://doi.org/10.1111/j.1151-2916.1969.tb15841.x
Abstract
The internal friction of R2O·Al2O3·6SiO2 glasses was measured from‐180° to 700°C at 0.4 Hz. Glasses containing Li2O or Na2O exhibited only the one internal friction peak characteristic of the stress‐induced movement of the alkali ions. Substitution of a second alkali resulted in two significant changes in the internal friction: (1) a rapid reduction in the magnitude of the original alkali peak and (2) the appearance of a new internal friction peak whose magnitude was especially sensitive to the concentration of the second alkali. Each combination of two alkali ions resulted in a new peak, with peaks being observed for the combinations Li‐Na, Na‐K, and Li‐K. A mechanical damping spectrum is predicted for aluminosilicate glasses containing more than two alkali ions.This publication has 4 references indexed in Scilit:
- Mechanical Relaxations in Mixed‐Alkali Silicate Glasses: I, ResultsJournal of the American Ceramic Society, 1969
- Properties of Soda Aluminosilicate Glasses: II, Internal FrictionJournal of the American Ceramic Society, 1962
- Internal Friction of Simple Alkali Silicate Glasses Containing Alkaline‐Earth Oxides: I, Experimental ResultsJournal of the American Ceramic Society, 1960
- Two Peaks in the Internal Friction as a Function of Temperature in Some Soda Silicate GlassesJournal of the American Ceramic Society, 1957