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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 >The effect of zinc and titanium on the structure of calcium-sodium phosphate based glass
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The effect of zinc and titanium on the structure of calcium-sodium phosphate based glass

机译：锌和钛对钙钠磷酸盐基玻璃结构的影响

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摘要

An array of different structural probes has been used to define the effect of adding Zn and Ti to a sodium- calcium phosphate glass. X-ray absorption spectroscopy at the Zn K-edge suggests that the Zn atoms occupy mixed (4- and 6-fold) sites within the glass matrix. X-ray diffraction reveals a feature at 2.03 ? that develops with the addition of Zn and Ti and is consistent with Zn-O and Ti-O near-neighbour distances. Neutron diffraction is used to resolve two distinct P-O distances and highlights the decrease in P·· ·P coordination number from 2.0 to 1.7 as the Ti metal concentration rises, which is attributed to the O/P fraction moving away from the metaphosphate value of 3.0 to 3.1 with the addition of Ti. Other correlations, such as those associated with CaOx and NaOx polyhedra, remain largely unaffected. These results suggest that the network forming P·· ·P correlation is most disrupted, with the disorder parameter rising from 0.07 to 0.10 ? with the additional modifiers. Zn appears to be introduced into the network as a direct replacement for Ca and causes no structural variation over the composition range studied.
机译：已经使用了一系列不同的结构探针来定义将锌和钛添加到磷酸钠钙玻璃中的效果。 Zn K边缘的X射线吸收光谱表明，Zn原子占据了玻璃基质内混合的（4倍和6倍）位。 X射线衍射显示出2.03Ω的特征。随着锌和钛的添加而发展，并且与Zn-O和Ti-O的近邻距离一致。中子衍射用于解析两个不同的PO距离，并突出显示随着Ti金属浓度的升高，P···P配位数从2.0降低到1.7，这归因于O / P分数偏离了偏磷酸盐3.0的值添加Ti，达到3.1。其他关联（例如与CaOx和NaOx多面体关联的关联）在很大程度上不受影响。这些结果表明，形成P···P相关性的网络受到的破坏最大，无序参数从0.07上升到0.10≤P。与其他修饰符。 Zn似乎是作为Ca的直接替代物引入网络的，并且在所研究的组成范围内不会引起结构变化。

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