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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 >Equilibrium concentration of oxygen rich and deficient defect centers in germanosilicate glasses
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Equilibrium concentration of oxygen rich and deficient defect centers in germanosilicate glasses

机译：锗硅酸盐玻璃中富氧缺陷中心的平衡浓度

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摘要

Equilibrium concentrations of oxygen rich and deficient defect centers are calculated as a function of temperature and glass redox condition for germanosilicate glasses. We have here used the approach of Silin and Lace [J. Non-Cryst. Solids 1419 (1992) 54-61] but extended it to include the case of binary system of germanosilicate glasses. A set of 23 reactions is identified as the possible pathway for formation of different defect centers. Each of these reactions are represented by forward and backward steps with Arrhenius kinetics and their activation energies are estimated based on the relevant bond energies of the involved species. Equilibrium concentrations are determined by setting rates of each of these reactions equal to zero. Typical results are presented for glasses, which are: (i) stoichiometric, (ii) glasses with excess oxygen levels of 10(16) to 10(20) cm(-3) and (iii) glasses which are oxygen deficient by 10(16) to 10(18) cm(-3). (C) 2004 Elsevier B.V. All rights reserved.
机译：计算锗硅酸盐玻璃的富氧和缺陷中心缺陷的平衡浓度与温度和玻璃氧化还原条件的关系。我们在这里使用了Silin和Lace的方法[J.非Cryst。 Solids 1419（1992）54-61]，但将其扩展到包括锗硅酸盐玻璃的二元体系。一组23种反应被确定为形成不同缺陷中心的可能途径。这些反应中的每一个都由具有Arrhenius动力学的前进和后退步骤表示，并且它们的活化能是基于所涉及物种的相关键能来估算的。通过将每个反应的速率设置为零来确定平衡浓度。眼镜的典型结果如下：（i）化学计量的;（ii）氧气水平在10（16）至10（20）cm（-3）的玻璃;以及（iii）氧气不足10（ 16）至10（18）cm（-3）。 （C）2004 Elsevier B.V.保留所有权利。

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