液态到冰相转换的多参数表征使用批量声波
Andrey Smirnov1, Vladimir Anisimkin1, Natalia Voronova2
1Kotelnikov Institute of Radio Engineering and Electronics of RAS, Moscow 125009, Russia.
Sensors (Basel, Switzerland)
|June 27, 2024
概括
这项研究引入了一种使用大批声波 (BAWs) 来检测液体转化为冰的新方法. 该技术准确地描述了水和盐溶液中的相变,为各种应用提供了宝贵的见解.
科学领域:
- 材料科学 材料科学 材料科学
- 声学 声学 在声学方面
- 物理化学 物理化学
背景情况:
- 检测液态到冰相转变对于许多科学和工业应用至关重要.
- 现有的方法可能缺乏精确过渡分析所需的多参数表征.
- 声波传播特性在液态和固态之间显著不同,提供了潜在的检测机制.
研究的目的:
- 提出和验证一种新的方法,用于多参数描述液态到冰相过渡的过程.
- 利用大批声波 (BAWs) 来探测相变期间的物理性质.
- 开发和测试一种双传感器系统,用于同时分析多个液体样本中的相变.
主要方法:
- 采用了具有纵向 (L) 和剪切垂直 (SV) 偏振的散装声波 (BAW).
- 在冰中测量L-BAW和SV-BAW的速度和减弱,频率范围为1-37 MHz.
- 确定雷利表面声波和波桑模量的参数,评估样品均性,并测试了使用蒸水和NaCl溶液的双传感器设置.
主要成果:
- 成功测量了L-BAW和SV-BAW在冰中的速度和衰减.
- 导出了关键参数,包括雷利表面声波特性和冰的波桑模量.
- 演示了双传感器系统分析不同液体同时发生的两相过渡的能力.
结论:
- 拟议的基于BAW的方法提供了一种可靠的方法,用于从液体转化为冰的多参数表征.
- 该技术在分析纯水和盐溶液中的相变方面是有效的.
- 开发的双传感器系统显示了在多个样本中同时监测相位转换的前景.
相关概念视频
02:33Phase Transitions: Sublimation and Deposition
17.1K
Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
17.1K
02:39Phase Transitions: Melting and Freezing
12.4K
Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
12.4K
01:09Deriving the Speed of Sound in a Liquid
497
As with waves on a string, the speed of sound or a mechanical wave in a fluid depends on the fluid's elastic modulus and inertia. The two relevant physical quantities are the bulk modulus and the density of the material. Indeed, it turns out that the relationship between speed and the bulk modulus and density in fluids is the same as that between the speed and the Young's modulus and density in solids.
The speed of sound in fluids can be derived by considering a mechanical wave...
The speed of sound in fluids can be derived by considering a mechanical wave...
497