超越表面:粘度,晶体生长和地球上的扩散的相互联系 玻璃成型器
Jaroslav Barták1, David Vaculík1, Michaela Vceláková2
1Department of Physical Chemistry, University of Pardubice, Studentska 573, 53210 Pardubice, Czech Republic.
The journal of physical chemistry. B
|October 7, 2024
概括
-玻璃中的晶体生长率在薄膜中明显更快,而不是在散装中. 这项研究将晶体生长与粘度和扩散联系起来,揭示了对无形固体行为的洞察力.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 无形固体是一种无形的固体.
背景情况:
- 了解粘度,晶体生长和扩散对于无形固体 (散装玻璃和薄膜) 至关重要.
- 这些特性影响了这些材料的生产,加工和应用.
研究的目的:
- 用显微镜研究Ge25Se75散装玻璃和薄膜中的体积晶体生长.
- 分析结晶生长速度与近表面和融化粘度相关.
- 为了确定扩散系数,并解释散装和薄膜之间的生长速度的差异.
主要方法:
- 用于体积晶体生长研究的显微镜.
- 用于近表面粘度测量的纳米印记.
- 压力辅助的融填充用于融粘度的确定.
主要成果:
- 薄膜表现出明显更高的晶体生长率比散装玻璃.
- 晶体生长分析提供了对结构单位和扩散系数的洞察.
- 观察到扩散和粘性流之间的脱,偏离了斯托克斯-爱因斯坦-艾林关系.
结论:
- 这项研究提供了第一个有效的自我扩散系数的估计,该估计是从石灰质玻璃制造商的生长数据中得出的.
- 建立了扩散系数 (D) 和晶体生长率 (u) 之间的关系:u ≈ D^0.87.
- 这种关系与其他分子玻璃的发现一致,突出了无形固体行为中的普遍原则.
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