"The distribution of relaxation times for the alkali peak in a Li₂ O·A1₂O₃ ·2.0SiO₂ glass and for the mixed alkali peak in a 0.5Li₂O·0.5Na₂O·A1₂O₃·2.OSiO₂ glass was studied using the internal friction technique. A lognormal distribution of relaxation times provided the best agreement with the experimental data. The ß parameter of the lognormal distribution function, which is related to the half-height peak width, varied with temperature, indicating that the distribution of relaxation times is dependent upon the activation energy and the activation entropy of the relaxation mechanism. The major contributor to the distribution of relaxation times is a wide distribution in the activation entropy, while the distribution in activation energy is relatively narrow. No noticeable change in internal friction was found when precautions were taken to eliminate any surface water on a specimen"--Abstract, Page ii.
Day, D. E.
Foster, J. Earl
Davis, Robert L.
Moore, Robert E., 1930-2003
Hansen, Peter G., 1927-2010
Materials Science and Engineering
Ph. D. in Ceramic Engineering
National Defense and Education Act Title IV Fellowship
University of Missouri--Rolla
vii, 75 Pages
© 1970 David Wayne Moore, All rights reserved.
Dissertation - Open Access
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Moore, David Wayne, "Temperature variation in distribution of relaxation times in aluminosilicate glasses" (1970). Doctoral Dissertations. 2288.