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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 >Immiscibility in binary silicates: chemical and phase equilibria
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Immiscibility in binary silicates: chemical and phase equilibria

机译：二元硅酸盐的不溶混性：化学和相平衡

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摘要

The driving force for immiscibility in binary silicates was examined using a statistical theory which combines a Flory-type theory, based on the compatibility of structural units, and a chemical equilibrium model, that describes the preferred associated species distribution of silicates. Restrictions imposed by a preferred distribution of associated species lead to a limitation of the number of ways to form a complete network structure, or equivalently to a decrease in the configurational entropy. An increase in configurational entropy is achieved by inducing a phase separation. The role of the enthalpies of species formation is examined relative to the configurational entropic contribution to phase coexistence. The theory leads to a rich set of phase coexistence behavior that includes three-phase equilibrium and a higher order critical point. (C) 1998 Elsevier Science B.V. All rights reserved. [References: 23]
机译：使用统计理论检验了二元硅酸盐中不溶混的驱动力，该统计理论基于结构单元的相容性结合了Flory型理论和描述了优选的硅酸盐相关物种分布的化学平衡模型。关联物种优选分布所施加的限制导致形成完整网络结构的方式数量受到限制，或者等效地导致构型熵的减少。通过引起相分离来实现构型熵的增加。相对于构型的熵对相共存的贡献，检查了物种形成的焓的作用。该理论导致了丰富的相位共存行为集，其中包括三相平衡和更高阶的临界点。 （C）1998 Elsevier Science B.V.保留所有权利。 [参考：23]

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