MECHANICAL DAMPING SPECTRUM FOR MIXED-ALKALI R2O.AL2O3.6SIO2 GLASSES

被引:25
作者
DAY, DE
STEINKAM.WE
机构
[1] Department of Ceramic Engineering, University of Missouri, Rolla, Missouri
关键词
D O I
10.1111/j.1151-2916.1969.tb15841.x
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
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. Copyright © 1969, Wiley Blackwell. All rights reserved
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页码:571 / &
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