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Updated: Jun 26, 2025

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在不平衡的界面迁移控制结晶Li₂SiO₃从Li₂O-SiO₂融化通过时空温度和度场

Sanchita Chakrabarty¹, Haojie Li¹, Michael Fischlschweiger¹

¹Chair of Technical Thermodynamics and Energy Efficient Material Treatment, Institute of Energy Process Engineering and Fuel Technology, Clausthal University of Technology, Agricolastraße 4, 38678 Clausthal-Zellerfeld, Germany.

|May 20, 2024

概括

了解固化动态是定制固体相的关键,特别是从电池渣中回收有价值的 (Li). 这项研究模拟了不同冷却速率下的接口行为,以优化相位形成.

科学领域:

材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.
热力学是一种热力学.

背景情况:

固化涉及质量,热扩散和潜热的复杂相互作用,影响相位属性.
从电池渣中定制固体相,特别是 (Li) 相,需要了解接口动力学和批量传输过程.
预测冷却速度对控制固化的内部过程的影响仍然是一个挑战.

研究的目的:

开发一个热力学上一致的不平衡模型来模拟固化过程.
为了研究氧化物-二氧化 (Li2O-SiO2) 融中的酸盐 (Li2SiO3) 的固化,与电池回收相关.
分析不同外部冷却速率对接口动态和由此产生的相位形成的影响.

主要方法:

开发了一个不平衡模型,考虑时空温度和度场.
将固体/液体接口作为移动热源进行处理.
评估空间温度异质性及其与不同热提取配置文件下的内部材料流和接口速度的相关性.

主要成果:

由于潜热,接口速度最初会降低,在较低的冷却速度下持续时间更长.
接下来是一个热力学控制的模式,其中速度增加到最大,与冷却速率相反.
最后,接口传播速度减慢,由动力学因素决定.

结论:

该模型提供了在不同的冷却条件下对固化行为的洞察.
了解热力学和运动力之间的相互作用对于控制固化至关重要.
这种方法有助于工程师从废物流中获得所需的固体相,例如电池渣.

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