Structure Dependence of Poisson's Ratio in Cesium Silicate and Borate Glasses.

ABSTRACT: In glass materials, Poisson's ratio (ν) has been proposed to be correlated with a variety of features, including atomic packing density (Cg), liquid fragility (m), and network connectivity. To further investigate these correlations in oxide glasses, here, we study cesium borate and cesium silicate glasses with varying modifier/former ratio given the difference in network former coordination and because cesium results in relatively high ν compared to the smaller alkali modifiers. Within the binary glass series, we find positive correlations between ν on one hand and m and Cg on the other hand. The network former is found to greatly influence the correlation between ν and the number of bridging oxygens (nBO), with a negative correlation for silicate glasses and positive correlation for borat

SUBMITTER: Ostergaard MB 

PROVIDER: S-EPMC7345141 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature