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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 >Effect of composition on ionic transport in SiO2-B2O3-Na2O glasses
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Effect of composition on ionic transport in SiO2-B2O3-Na2O glasses

机译：组成对SiO2-B2O3-Na2O玻璃中离子迁移的影响

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摘要

Ionic diffusion was investigated in the SiO2-B2O3-Na2O glass system over a wide composition range by impedance spectroscopy measurements. The Na+ cation transport mechanism was described by an interstitial pair migration model based on Frenkel defects in ionic crystals. The activation energy of the static electrical conductivity is shown to be correlated with the boron coordination number in these glasses. Published B-11 NMR results were used to calculate the activation energies of sodium cations acting as charge compensators for the [BO4/2](-) tetrahedron and of sodium cations bonded to non-bridging oxygen atoms. These values are in agreement with the activation energies of the Na2O-B2O3 and Na2O-SiO2 binary systems, respectively. (c) 2006 Elsevier B.V. All rights reserved.
机译：通过阻抗光谱测量，研究了SiO2-B2O3-Na2O玻璃系统中离子扩散的广泛组成范围。通过基于离子晶体中弗伦克尔缺陷的间隙对迁移模型描述了Na +阳离子的迁移机理。在这些玻璃中，静态导电性的活化能与硼的配位数相关。已公开的B-11 NMR结果用于计算充当[BO4 / 2]（-）四面体的电荷补偿剂的钠阳离子的活化能，以及与非桥接氧原子键合的钠阳离子的活化能。这些值分别与Na2O-B2O3和Na2O-SiO2二元体系的活化能一致。 （c）2006 Elsevier B.V.保留所有权利。

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