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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Changing poisson's ratio of mesoporous silica monoliths with high temperature treatment
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Changing poisson's ratio of mesoporous silica monoliths with high temperature treatment

机译：通过高温处理改变介孔二氧化硅整体的泊松比

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摘要

The elastic moduli of mesoporous (fractal pore structure with a statistical pore size distribution with a maximum in the mesopore region) silica monoliths (silica acrogets) were measured in situ during calcination using the resonant beam technique. Above a temperature of approximately 573 K, a significant increase of the elastic moduli with increasing heat treatment temperature was observed, which was attributed to the rearrangement and completion of the network. Poisson's ratio is close to zero up to this temperature and then increases to a positive value typical for isotropic bodies. (c) 2006 Elsevier B.V. All rights reserved.
机译：使用共振束技术在煅烧过程中现场测量了介孔（在中孔区域具有统计孔径分布的统计孔隙尺寸，最大值在中孔区域）的弹性体的弹性模量。在大约573 K的温度以上，观察到弹性模量随热处理温度的升高而显着增加，这归因于网络的重新排列和完成。在此温度下，泊松比接近于零，然后增加到各向同性物体的典型正值。 （c）2006 Elsevier B.V.保留所有权利。

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