Kinetics Study of Crystallization with the Disorder鈥揵cc鈥揻cc Phase Transition of Charged Colloidal Dispersions

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• 作者：Hongwei Zhou ; Shenghua Xu ; Zhiwei Sun ; Xuan Du ; Lixia Liu
• 刊名：Langmuir
• 出版年：2011
• 出版时间：June 21, 2011
• 年：2011
• 卷：27
• 期：12
• 页码：7439-7445
• 全文大小：896K
• 年卷期：v.27,no.12(June 21, 2011)
• ISSN：1520-5827

文摘

Structure transformation (disorder鈥揵cc鈥揻cc) in charged colloidal dispersions, as a manifestation of the Ostwald鈥檚 step rule, was confirmed by means of reflection spectrum (RS) measurements in our previous study. By taking advantage of a reflection spectrum containing plenty of information about the crystallization behaviors, time-dependent changes of parameters associated with the crystal structure and composition during the disorder-bcc-fcc transition are reported by treating the data from RS in this article. In addition, Avrami鈥檚 model is adopted to analyze the transition process and investigate the transition rate. On the basis of the above investigations, associated kinetic features of crystallization with the disorder-bcc-fcc transition are described.