麦文浩,吕豪,郑雅元,杜怀明,马婷,徐鑫平,苟城,周游

• 1:四川轻化工大学化学工程学院

摘要(Abstract)：

磷酸二氢钾(KDP)是一种泛化性应用于工业、农业和医学中的重要化学成分。工业上KDP的生产已经较为纯熟，但纯水体系中易出现包裹体、裂纹、枝晶生长，导致光学均匀性差、激光损伤阈值低等问题。针对这一问题，文中探讨了KDP在一定比例乙二醇-水体系中的生长成核动力学，并通过控制溶液的过饱和比和温度，分析了诱导期与成核速率之间的关系。研究结果表明：在过饱和比S > 1.08时，均质成核占主导地位，而在S<1.06时，异质成核占主导。在成核参数方面，随着过饱和比的增加，成核自由能阻碍，临界成核半径与临界成核分子数均显著降低，初级成核速率增加，印证了温度和过饱和比在成核过程中的重要作用；通过对表面熵因子的分析，证明了KDP的结晶主要采用连续生长机制。此外，探究了转速、过饱和比、悬浮密度对粒径、生长速率及成核速率的影响，使用二参数C-R模型和三参数ASL模型对KDP的线性生长速率进行拟合及计算，确定了生长与成核过程的动力学方程。研究结论为解决工业合成KDP的晶体缺陷、能耗高、工艺不稳定等核心问题提供参考。

关键词(KeyWords)： 磷酸二氢钾;结晶动力学;成核机制;搅拌结晶

Abstract:

Keywords:

基金项目(Foundation): 四川省科技计划（2020YFG0163）;; 精细化工应用技术泸州市重点实验室（HYJH-2305-B）;; 四川轻化工大学研究生创新基金资助（Y2024103）;; 钒钛资源综合利用四川省重点实验室（2018FTSZ13）

作者(Author): 麦文浩,吕豪,郑雅元,杜怀明,马婷,徐鑫平,苟城,周游

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