Mechanical Relaxations in Mixed-Alkali Silicate Glasses I
The internal friction of silicate glasses containing mixtures of Li-Na, Li-K, Li-Rb, Li-Cs, Na-K, Na-Rb, Na-Cs, and K-Rb was measured from -180° to 500°C at a frequency of 0.4 Hz. Values for the density, index of refraction, and dynamic shear modulus are also reported. with small additions of a second alkali, a new internal friction peak was observed in addition to the two peaks originally present in the glasses containing only one alkali. the magnitude of this new peak was especially sensitive to small amounts (less than 1 mol%) of a second alkali. Activation energies are given for the alkali peak in Li-Cs glasses and for the new internal friction peak in Li-Na glasses.
J. E. Shelby and D. E. Day, "Mechanical Relaxations in Mixed-Alkali Silicate Glasses I," Journal of the American Ceramic Society, Wiley-Blackwell, Apr 1969.
The definitive version is available at http://dx.doi.org/10.1111/j.1151-2916.1969.tb13358.x
Materials Science and Engineering
Article - Journal
© 1969 Wiley-Blackwell, All rights reserved.