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首页> 外文期刊>Crystal Research and Technology: Journal of Experimental and Industrial Crystallography >Determination of nucleation parameters and the solid liquid interfacial energy of the KCl-ethanol-water system
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Determination of nucleation parameters and the solid liquid interfacial energy of the KCl-ethanol-water system

机译：KCl-乙醇-水系统的成核参数和固液界面能的确定

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摘要

The kinetic parameters of homogeneous nucleation of KCI in different ethanol-water solvent mixtures were determined at 25 degrees C from the experimental measurements of the width of the metastable zone at different cooling rates. The ethanol mass ratio in the ethanol water solvent mixture was varied from 0-0.9 and the metastable zone width for each solvent mixture was measured under the cooling rates of 10, 20 and 30 K/h. The influence of ethanol ratio on the activity coefficient was calculated. It was found that increasing the ethanol ratio in the solvent mixture leads to an increase in the mean molal activity coefficient. The experimental results obtained showed that the increase in the ethanol ratio in the solvent widens the metastable zone for the crystallization of KCL Also it has inferred from the calculations based on the classical nucleation theory that increasing of the ethanol ratio in the solvent mixture resulted in an increase of the nucleation rate order, increase of the critical size of nuclei and increase of the solid liquid interfacial energy. It has been found that the solid liquid interfacial energy can be good correlated with inversely proportionality to the solubility. (C) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
机译：根据在不同冷却速率下亚稳区宽度的实验测量值，在25摄氏度下确定了不同乙醇-水溶剂混合物中KCI均相成核的动力学参数。乙醇-水-溶剂混合物中的乙醇质量比在0-0.9之间变化，并且在10、20和30 K / h的冷却速率下测量每种溶剂混合物的亚稳区域宽度。计算了乙醇比对活性系数的影响。发现增加溶剂混合物中的乙醇比率导致平均摩尔活性系数增加。实验结果表明，溶剂中乙醇比的增加扩大了KCL结晶的亚稳区。从经典成核理论的计算可以推断，溶剂混合物中乙醇比的增加导致了KCL的结晶。成核速率顺序的增加，核的临界尺寸的增加和固液界面能的增加。已经发现，固液界面能可以与溶解度成反比。 （C）2007 WILEY-VCH Verlag GmbH＆Co. KGaA，Weinheim。

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