和混合影响玻璃玻璃酸盐的导热性
Qing Zhang1, Shenglin Chen1, Yingting Cai2
1State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China. thz@whut.edu.cn.
Physical chemistry chemical physics : PCCP
|June 2, 2025
概括
这项研究揭示了酸盐玻璃中氧化物和氧化物混合如何影响导热. 混合效应导致非线性变化,主要是由于声音速度的变化.
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:
- 玻璃的导热性对于材料设计至关重要.
- 混合离子 (和) 对玻璃性能的影响是复杂的.
- 了解结构属性关系是定制热性能的关键.
研究的目的:
- 为了研究和对玻璃玻璃的导热率的联合作用.
- 阐明对观察到的热性质变化负责的潜在机制.
- 为设计具有受控导热性的玻璃提供见解.
主要方法:
- 酸盐玻璃系列的合成,含有不同比例的氧化和氧化.
- 使用已确定的技术测量导热率.
- 使用核磁共振 (NMR) 和拉曼光谱学分析局部结构和结合.
主要成果:
- 随着含量增加,观察到热导率的明显非线性变化,表明混合效应.
- 热导率主要由声速决定,热容量和声平均自由路径保持相对不变.
- 核磁共振和拉曼光谱显示了离子协调的非线性变化和原子包装分数的异常变化.
结论:
- 混合效应显著影响这些酸盐玻璃的导热性.
- 原子层面的结构重组,特别是离子协调,与热性质变化直接相关.
- 这项研究提供了对热传输机制的基本理解,并指导了先进的功能性玻璃的开发.
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