摘要
基于化学键合的角度对晶体生长过程的理解,提出了一个由动力学因素控制的形貌预测模型。该模型同时考虑了晶体内部结构和环境生长因素对晶体最终形貌的影响。对磷酸二氢钾(KDP)和磷酸二氢铵(ADP)晶体在不同动力学条件下的生长形貌进行了理论模拟,所预测的结果与实验观测结果基本一致。同时比较了相同过饱和度条件下KDP和ADP晶体的生长形貌,认为晶体局部成键性质不同是导致两者形貌差异的根本原因。本文通过对动力学因素控制的生长形貌的分析,为实际晶体生长过程中的形貌调控研究及应用提供理论依据。
A chemical bonding method for kinetically predicting the growth shape of single crystals was proposed. An attempt was made to find the relation between crystal morphology and both internal and external factors. To validate this model, we applied it to potassium dihydrogen phosphate （KDP） and ammonium dihydrogen phosphate （ADP） crystals grown from aqueous solution, shape evolutions can be got by changing the habit-controlling factors. The simulated results matched well with our experimental results. Furthermore, we elucidated the reason of the different morphology at the same supersaturation for KDP and ADP crystals. Based on the analysis of growth morphologies controlled by the kinetic factors, we try to open up a way for the study of morphology tuning and applications in real crystal growth processes.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2009年第2期396-401,共6页
Journal of Synthetic Crystals
基金
教育部新世纪优秀人才支持计划(NCET-05-0278)
国家自然科学基金资助项目(No.50872016)
关键词
生长模型
结晶形貌
化学键
动力学
growth model
crystal morphology
chemical bond
kinetics
