"Internal friction and sodium and potassium self-diffusion coefficients for (1-X)Na₂O · XK₂O· 3SiO₂ glasses were measured. Alkali diffusion was measured between 300 and 500ºC using radioactive isotopes and a thin-sectioning technique. Internal friction was measured from room temperature to 500ºC, 0.1 to 2000 Hz. Comparison between alkali diffusion and internal friction data for 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 for mixed-alkali internal friction is a cooperative rearrangement of dissimilar alkali ions, with the slower moving ion controlling the rate of reorientation"--Abstract, page iii.
Day, D. E.
Kreidl, N. J.
Sorrell, Charles A.,
McDonald, H. O. (Hector O.)
Materials Science and Engineering
M.S. in Ceramic Engineering
U.S. Army Research Laboratory
University of Missouri--Rolla
viii, 50 pages
© 1971 James William Fleming, Jr., All rights reserved.
Thesis - Open Access
Library of Congress Subject Headings
Internal friction -- Measurement
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Link to Catalog Record
Fleming, James W. Jr., "Alkali mobility and mechanical relaxation in mixed-alkali silicate glasses" (1971). Masters Theses. 5087.