Journal
JOURNAL OF CRYSTAL GROWTH
Volume 312, Issue 5, Pages 698-704Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jcrysgro.2009.12.031
Keywords
Cooling crystallization; Critical undercooling; Crystallite growth; Metastable zone width; Nucleation; Industrial crystallization
Funding
- Leverhulme Trust [F10100A]
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Crystallization in solutions under steady cooling is considered in the case of progressive nucleation, in which new crystallites are continuously nucleated among the already growing ones. Expressions are obtained for the total volume and number of crystallites as functions of the steadily increasing undercooling. These expressions are employed for determining the dependence of the relative critical undercooling u(c) for crystallization on the cooling rate q. The resulting u(c)(q) formula reveals that in the case of crystallization by progressive nucleation, the often used semi-empirical NyvIt equation is an approximation which contains only the linear terms in the relationship between In u(c) and In q. The results obtained are also directly applicable to overall crystallization of melts at sufficiently small undercoolings. (C) 2009 Elsevier B.V. All rights reserved.
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