层状结构材料的热分解

V.B. Okhotnikov, I.P. Babicheva, A.V. Musicantov, T.N. Aleksandrova
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引用次数: 12

摘要

用石英晶体微天平研究了层状蛭石单晶在~ 6.7 × 10−5 Pa真空条件下的等温脱水动力学。提出了气体从具有边界条件的半无限介质扩散的动力学模型,并考虑了通过“固-气”界面的传质。动力学在初始阶段可以用拟线性表达式来描述,在更大的时间可以用一阶方程来描述。根据实验数据估计了层间区域的扩散系数。所得值与准弹性中子散射法测量值一致。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Thermal decomposition of materials with layered structures

The kinetics of the isothermal dehydration of single crystals of vermiculite which have a layered structure, have been studied in vacuo of ~ 6.7 × 10−5 Pa by quartz crystal microbalance. A kinetic model is proposed for the process, which corresponds to gas diffusion from a semi-infinite medium with boundary conditions, and takes into consideration the mass transfer through the “solid-gas” interface. The kinetics can be described in terms of a quasilinear expression in the initial stages and as a first-order equation for greater times. From the experimental data the diffusion coefficients of the interlayer region have been estimated. The values obtained are in agreement with those measured by a quasi-elastic neutron-scattering method.

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