Mechanical Relaxations in Mixed Alkali Silicate Glasses: II, Discussion
Mechanical Relaxations in Mixed Alkali Silicate Glasses: II, Discussion
复制标题
混合碱硅酸盐玻璃的机械弛豫：II，讨论
DOI：
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发表时间：
1970
期刊：
影响因子：
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通讯作者：
D. Day
中科院分区：
文献类型：
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作者：
J. Shelby;D. Day
本文根据对混合碱效应提出的各种解释，对Li-Na、Li-K、Li-Rb、Li-Cs、Na-K、Na-Rb、Na-Cs和K-Rb混合硅酸盐玻璃的内耗进行了解释。发现由于应力诱导的碱离子移动的机械损耗峰（即碱峰）与电损耗性质之间存在直接相关性。当碱金属混合时出现的大的机械损耗峰归因于不同碱金属离子之间的相互作用，从而形成弹性偶极子。可比较的电损耗峰的不存在被解释为指示弹性偶极子是电不活跃的。在含有等摩尔量的两种碱金属的玻璃中，新的损失峰（即混合峰）的活化能和峰高与碱金属离子的尺寸差的关系比与碱金属离子的质量差的关系更密切。
The internal friction of mixed Li-Na, Li-K, Li-Rb, Li-Cs, Na-K, Na-Rb, Na-Cs, and K-Rb silicate glasses is interpreted on the basis of the various explanations proposed for the mixed alkali effect. A direct correlation was found between the mechanical loss peak due to the stress-induced movement of the alkali ions, i.e. the alkali peak, and the electrical loss properties. The large mechanical loss peak appearing when the alkalis are mixed was attributed to an interaction between dissimilar alkali ions such that an elastic dipole is formed. The absence of a comparable electrical loss peak was interpreted as indicating that the elastic dipole is electrically inactive. In glasses containing equimolar quantities of two alkalis, the activation energy and height of the new loss peak, i.e. the mixed peak, were more closely related to the size difference than to the mass difference of the alkali ions.