Relation of Alkali Mobility and Mechanical Relaxation in Mixed-alkali Silicate Glasses

Author

James W. Fleming Jr.
D. E. Day, Missouri University of Science and TechnologyFollow

Abstract

Internal friction and Na and K self-diffusion coefficients for (I-X)Na2OXK2O-3SiO2 glasses were measured. Alkali diffusion was measured between 300° and 500°C using radioactive isotopes and a thin-sectioning technique; internal friction was determined at room temperature to 500°C at 0.1 to 2000 Hz. Comparison of the data for alkali diffusion and internal friction in Na-K glasses with those for other mixed-alkali glasses shows that the mixed-alkali peak is related to alkali mobility. It is concluded that the mechanism of mixed-alkali internal friction is cooperative rearrangement of dissimilar alkali ions, with the slower-moving ion controlling the rate of reorientation.

Recommended Citation

J. W. Fleming and D. E. Day, "Relation of Alkali Mobility and Mechanical Relaxation in Mixed-alkali Silicate Glasses," Journal of the American Ceramic Society, Wiley-Blackwell, Apr 1972.

The definitive version is available at https://doi.org/10.1111/j.1151-2916.1972.tb11255.x

Department(s)

Materials Science and Engineering

International Standard Serial Number (ISSN)

0002-7820; 1551-2916

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1972 Wiley-Blackwell, All rights reserved.

Publication Date

01 Apr 1972