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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 >Effects of mixed alkaline earth oxides additive on crystallization and structural changes in borosilicate glasses
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Effects of mixed alkaline earth oxides additive on crystallization and structural changes in borosilicate glasses

机译：混合碱土金属氧化物添加剂对硼硅酸盐玻璃结晶和结构变化的影响

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摘要

The effects of mixed alkaline earth oxides on crystallization and structural changes in a multi-component borosilicate glass system are studied by using X-ray diffraction (XRD) and transmission electron microscope (TEM). It is found that the crystallization is decreased with increasing alkaline earth oxide content and there are also a series changes occurred in TEM images. This paper introduces the conception that alkaline earth ions tend to occupy their preferred sites regardless of glass systems. This conception is assisted to explain the TEM images to some extent by suggesting a simple structural model about non-bridging oxygen in glass network. The conception also indicates a 'blocking effect' existing in such a multi-component borosilicate glass system, which may be responsible for XRD results in chief. In addition, the structural model suggested by TEM results refers a new unit of Si-O-M2+-O-B, which helps in understanding the minimum exhibits in XRD results. Moreover, a dielectric test is taken to study glass properties in detail. (C) 2007 Elsevier B.V. All rights reserved.
机译：利用X射线衍射（XRD）和透射电子显微镜（TEM）研究了混合碱土金属氧化物对多组分硼硅酸盐玻璃体系中结晶和结构变化的影响。发现随着碱土金属氧化物含量的增加，结晶减少，并且在TEM图像中也发生一系列变化。本文介绍了这样一种概念，即无论玻璃系统如何，碱土金属离子都倾向于占据其首选位置。通过提出有关玻璃网络中非桥连氧的简单结构模型，这一概念在某种程度上有助于解释TEM图像。该概念还表明在这种多组分硼硅酸盐玻璃系统中存在“阻挡效应”，这可能是造成XRD结果的主要原因。此外，TEM结果建议的结构模型引用了一个新的Si-O-M2 + -O-B单元，这有助于理解XRD结果中的最小表现。此外，还进行了介电测试以详细研究玻璃性能。 （C）2007 Elsevier B.V.保留所有权利。

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