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在网络修改的酸盐玻璃中对疾病的量化

I Farnan¹, P J Grandinetti, J H Baltisberger

¹Department of Geology, Stanford University, California 94305.

|July 2, 1992

概括

核磁共振揭示了酸盐玻璃中的中距离秩序,澄清了结合角度和氧原子的分布. 这为玻璃结构和构成效应提供了关键的见解.

科学领域:

材料科学材料科学材料科学
固态化学固态化学
频谱学是一种光谱学.

背景情况:

酸盐玻璃中的局部原子顺序类似于晶体材料.
了解中距离的顺序对于解释玻璃的特性和组成效应至关重要.
之前的研究缺乏对中期结构安排的详细见解.

研究的目的:

在酸盐玻璃中研究中程订单.
为了阐明四面体之间的结合角度的分布.
为了确定氧原子围绕网络修饰阳离子的排序.

主要方法:

使用了二维17O动态旋转角度核磁共振 (2D 17O DAS NMR) 光谱.
分析了光谱数据,以探测中间范围的原子排列.
专注于不同组成的酸盐玻璃系统.

主要成果:

在Si-O-Si键角的分布中确定了显著的中间顺序.
观察到氧原子在修改网络的阳离子周围的位置有很高的秩序.
核磁共振数据提供了详细的结构信息,超出了局部订单.

结论:

酸盐玻璃表现出明显的中间范围结构秩序.
2D 17O DAS NMR是一种强大的技术,用于表征玻璃结构.
这些发现有助于我们更好地理解构成如何影响玻璃网络拓.

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