使用XRD,FTIR和EPR光谱学对酸玻璃的结构光
Mohamed A Morsy1,2, Thomas F Garrison2, Michael R Kessler2
1Chemistry Department, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia.
ACS physical chemistry Au
|March 31, 2025
概括
这项研究揭示了和氧化物如何改变酸玻璃结构. 集成到框架中,而导致混乱,BO4单位被重新解释为扭曲的BO3组与非桥接氧气.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 玻璃科学 玻璃科学
背景情况:
- 酸 (LiB) 玻璃在各种应用中至关重要.
- 了解玻璃修饰器的结构修改对于材料设计至关重要.
研究的目的:
- 用 (II) 氧化物和氧化物修饰剂研究 LiB 玻璃的结构变化.
- 阐明玻璃修饰剂在酸盐网络中的作用,并确定晶体相.
- 用光谱和计算方法来描述玻璃的振动模式和局部结构.
主要方法:
- 用X射线衍射 (XRD) 进行晶相识别.
- 福里埃变换红外 (FTIR) 和电子磁共振 (EPR) 谱学用于结构分析.
- 对热性质进行差异热分析 (DTA).
- 对于振动模式和几何学的半经验建模 (PM3MM).
主要成果:
- 氧化的结合导致了氧化晶体阶段.
- 添加 (II) 氧化物破坏了玻璃结构,形成了四酸盐相.
- 分析将BO4单元的存在修改为具有非桥接氧 (NBO) 原子的扭曲三角形BO3组.
- 在g ≈4.2处具有特定信号的EPR光谱相关联NBOs.
结论:
- 玻璃修饰剂显著改变玻酸盐玻璃的结构.
- 该研究提供了对酸盐结构单位和NBO的作用的修订理解.
- 光谱和计算方法有效地描述了玻璃结构和变量相互作用.
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