Mechanical Damping Spectrum for Mixed-Alkali R2 O·Al2 O3·6SiO2 Glasses
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.
D. E. Day and W. E. Steinkamp, "Mechanical Damping Spectrum for Mixed-Alkali R2 O·Al2 O3·6SiO2 Glasses," Journal of the American Ceramic Society, vol. 52, no. 11, pp. 571-574, Wiley-Blackwell, Nov 1969.
The definitive version is available at http://dx.doi.org/10.1111/j.1151-2916.1969.tb15841.x
Materials Science and Engineering
Keywords and Phrases
Glass; In; Internal Friction; Jacta; Mechanical Properties; Silicates
International Standard Serial Number (ISSN)
Article - Journal
© 1969 Wiley-Blackwell, All rights reserved.