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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received September 21, 2000
Accepted December 26, 2000

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Estimation of Number of Surface Crystals on Sodium Fluoride Mother Crystal in Crystallization

Hong-Joo Kim Woo-Sik Kim^†

Department of Chemical Engineering, Institute of Materials Science and Technology, Kyunghee University, Keeheung Seochun 1, Kyungkee-Do, 449-701, Korea

Korean Journal of Chemical Engineering, March 2001, 18(2), 202-207(6), 10.1007/BF02698460

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Abstract

A simple model was developed to explain the surface crystals found on the clear mother crystal face. The surface crystals on the mother crystal in the reaction crystallization of sodium were mathematically estimated by using a model based on two-dimensional secondary nucleation and two-step growth mechanisms. The model predicted that the surface crystals found on the mother crystal would be sensitive to the reactant concentration and agitation speed due to their influence on the interfacial supersaturation in the crystal growth. As the bulk supersaturation increased and the molecular transport was facilitated, the number of surface crystals on the mother crystal also increased, because the interfacial supersaturation built up on the mother crystal surface was enhanced. The prediction of the number of the surface crystals on the mother crystal appeared to be consistently comparable with experimental results.

Keywords

Sodium Fluoride Surface Crystal Secondary Nucleation Two-Step Growth Interfacial Supersaturation Crystallization Conditions

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