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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 >Elastic models for the non-Arrhenius viscosity of glass-forming liquids
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Elastic models for the non-Arrhenius viscosity of glass-forming liquids

机译：形成玻璃液体的非阿伦尼乌斯粘度的弹性模型

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This paper first reviews the shoving model for the non-Arrhenius viscosity of viscous liquids. According to this model the main contribution to the activation energy of a flow event is the energy needed for molecules to shove aside the surrounding, an energy which is proportional to the instantaneous shear modulus of the liquid. Data are presented supporting the model. It is shown that the fractional Debye-Stokes-Einstein relation, which quantitatively expresses the frequently observed decoupling of, e.g., conductivity from viscous flow, may be understood within the model. The paper goes on to review several related explanations for the non-Arrhenius viscosity. Most of these are also 'elastic models', i.e., they express the viscosity activation energy in terms of short-time elastic properties of the liquid. Finally, two alternative arguments for elastic models are given, a general solid-state defect argument and an Occam's razor type argument. (c) 2006 Published by Elsevier B.V.
机译：本文首先回顾了粘性液体非阿累尼乌斯粘度的推压模型。根据该模型，对流动事件的活化能的主要贡献是分子推开周围环境所需的能量，该能量与液体的瞬时剪切模量成比例。提供了支持该模型的数据。已经表明，在模型中可以理解分数德拜-斯托克斯-爱因斯坦关系，该关系定量地表达了经常观察到的例如电导率与粘性流的解耦。本文继续回顾了非阿累尼乌斯粘度的几种相关解释。这些中的大多数也是“弹性模型”，即，它们以液体的短时弹性特性表示粘度活化能。最后，给出了两个用于弹性模型的替代参数，一个通用的固态缺陷参数和一个Occam的剃刀类型参数。 （c）2006年由Elsevier B.V.发布

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